Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f07c9646d6a20b…

MALICIOUS

PDF

86.1 KB Created: 2021-06-29 03:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5ce4e7befc4486702107e1361e0526a0 SHA-1: 0532ef51e2a42b09152afa56afa4651291aeeb75 SHA-256: 96f07c9646d6a20b1fc0d2150ad4c1b1352f1a9ef557245ce82aeaea238b7743
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF that contains a link farm pointing to other PDFs hosted on compromised websites, a common tactic for phishing or malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct the user to open a password-protected archive, likely to bypass gateway security. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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.
  • 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://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/cdbe64aea02ee1a4c7279b925f214784/toxewebupamega.pdf In PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021514059577225.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/el5u9au8nt2440v2sak58ca117/kopetutanuzapurut.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/43328323530.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/sb2darhq5qeephp45oajc4es06/fogiti.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/vp007lp9jmci4358o68st2km85/44040535432.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/48bpo89rrhtpl7h8pflmvfn386/gepikokexegawuv.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/nojevunojezosifagegebi.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a485d2a8eac---valitakowufodikaveb.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/73d09c80b511c45cc6cc741dbfc88b9b/tewavo.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/97518707534.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afffe6085a---zofukolaleb.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/kibivumilafokubajatel.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/23281876314.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d034e9dec0a---74647909074.pdfIn PDF document text
    • http://raykingcarroll66.com/clients/2/29/292092747e06e0ab09130fa737b110c0/File/99845042457.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/da6dcd436808f744050e7264fc85e929/43615633163.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/bewowadamijonet.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-6-7/20210607082428381120.pdfIn PDF document text
    • http://artside.org/data/temp/file/18080947927.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/rakimikevuneneluno.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/ledifoxodosubolakitix.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/dd9fd86db2b2d9e106e1d3afe4505f81/65982675295.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16082faef841fd---78906371348.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/84288321967.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/5268121277.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c052119bd6---63740227253.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=manually+operated+inventory+control+systemPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 10948 bytes
SHA-256: f5161340cfc71956205368281b73122ddbe8698fb49d0be55360d66290bd5e4b
font_01_sfnt_off00010685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E97 17048 bytes
SHA-256: 5674a29443fdc46a308b5239225c3e097ff28787dfdca954a2a47b499ece46c9

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