Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7a2e5709899a9e…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 15:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7ef23cb86a170239ad4cf67897bf15c9 SHA-1: 8e6cc278c545bd8276d2c9cd37c2c53a0db934d8 SHA-256: db7a2e5709899a9eae454b9c6e9fb49e998b3a1c775edb4ddad0df0d21535cc3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many hosted on disposable domains or compromised CMS uploads, suggesting a phishing or malware distribution attempt. The presence of a link farm with a "utm_term" parameter further indicates an attempt to lure users to download files, possibly disguised as game downloads, which aligns with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=delta+force+black+hawk+down+download+for+android PDF link annotation
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/misivufanigigo.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/68349385044.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/4e61533066faf90b589b10ad72a8b20d/foponudalemazuzi.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/sonifuwumanixazaso.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/17861417226.pdfIn PDF document text
    • http://recrute.fr/files/files/55316464386.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/22072723945.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/5b155507261627a495f2759cc8b06b6f/zowelakujixod.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/93481594753.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/60738819999.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314d9d09619---66292695025.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d33cd9b6a4b533b85efbe2fcd29cd475/sugujujupid.pdfIn PDF document text
    • http://gyuco.com/uploadfile/files/20210918_065520.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/niluruzalatigereda.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/38357151780.pdfIn PDF document text
    • http://eko-uklid.com/files/file/darifumarokok.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/volivariwazemiko.pdfIn PDF document text
    • https://aspirans.com/files/file/41509145879.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/37167723372.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/zazedaguvugugoxedobo.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/gotetazufowipu.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/pagunalurulurozulafi.pdfIn PDF document text
    • http://strahyi.ru/images/file/7439807353.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/48861471261.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/tijulipusuriduxug.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161422c20d6257---6447902198.pdfIn PDF document text
    • 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_off0000dd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD23 16436 bytes
SHA-256: 82d5a0834ca650702dbb9452c4903559d5fea419a5d4c494c56dab49aee2b59c
font_01_sfnt_off00010785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9C 10724 bytes
SHA-256: 5ec5ff4832df2f0869e2d3bf0f5eac6519cfd1237d3e920d65cafd90de34bfed

Open this report in the interactive analyzer, or submit your own file for analysis.