Malicious PDF — malware analysis report

Static analysis result for SHA-256 d059e757a1083847…

MALICIOUS

PDF

86.1 KB Created: 2021-07-27 18:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 869f4bc3776f06dbf581081d4048a6e0 SHA-1: ecaecaadad6258b6ff3b715ebc6f71f88b00e1b6 SHA-256: d059e757a108384759b76ed91db027ede0914b59cb61f4b9d5048b1a937c744d
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains embedded JavaScript and multiple external links, many of which point to compromised WordPress sites or disposable hosting. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, with the password provided within the document itself. This is a common tactic to evade gateway security scanning. The embedded JavaScript and link farm suggest the document's primary purpose is to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/6db26846396f6fbded05c8b1fb56552a/21730176739.pdf In PDF document text
    • http://mateuszkucharski.pl/admin/file/50094973305.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/53563056637.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/mubifegotalenezawega.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160796619897f9---nepavivazan.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/41284165609.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896b9d1c363---62592172833.pdfIn PDF document text
    • http://farashimirooz.com/files/regujexevevixagi.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/kuvexedosotudowifuxoba.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/58832329912.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/xuregifowidojexiparuwu.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16080e2a6e1e06---64152691680.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/a7ec3512eb17cfc15ddc13f1cbb04f2e/47751084742.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/79672672121.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/cdc6bf982eea29edd154b92cef9cebba/35578945477.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071994e3702d---vusubogunomesezidapafu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1953ccf5b9---simixivez.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160844e504f4b7---34773976371.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ih1addjlbsrl8m19hgckj2eth3/54903186260.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/d51h9kc8rnmvbbek9b2e5paha2/fimufixoromo.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e427ebef759---zaginobut.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021051584855_945877472.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/fipulunumege.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c93e47589ee---nazovesolu.pdfIn PDF document text
    • http://dhs1959reunion.com/clients/871764/File/fatopulomawebitipokerig.pdfIn PDF document text
    • http://ntrc.biz/clients/f/f0/f0759d16aca5b3dfc9163ee994587b7f/File/lumemifejusivawog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=epson+l130+adjustment+program+free+download+zip+filePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AE 11548 bytes
SHA-256: 1501cd2d1a120823176657256e055ff820ec468d8a4c0f5cb84a0862761b00e5
font_01_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0C 17536 bytes
SHA-256: 14eb74dfaefff50a847834332b4afb191031872c494e771eb8a9eff854410fb5

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