Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c89dc83a6d2c73a…

MALICIOUS

PDF

59.5 KB Created: 2020-11-28 01:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 54acd78e6154bfa03cd3f7455a89461a SHA-1: df03ae54b2716474e86d8df9ef19f0dbb72ca6cf SHA-256: 0c89dc83a6d2c73a428e78d4f9e5cd608bee9c2e757c90718bacde1cdbed5e1d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=traffic+rider+apk+mod+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5fb71e2c6a954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f9c5fe3e3148.pdfIn PDF document text
    • https://tebokefabizanil.weebly.com/uploads/1/3/4/8/134866802/nijusadajar.pdfIn PDF document text
    • https://bejelubizibo.weebly.com/uploads/1/3/4/8/134870507/3b81d9fe1f85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_5fa606a42f033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f98f9bb2eec9.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/b612eaae80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_5fba249ca7fd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f8af0bc3aded.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/welutizenop/kubota_l2600_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2aff93-3f7f-45d2-8d05-d69a84f4ce2e/89928132650.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/cse_414_uw.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/face_apk_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/tekkit_launcher_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/printable_blank_lease_agreement_form_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c590efe-ac89-4ec4-960a-133fc4bc21f5/67419346934.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC65 5104 bytes
SHA-256: 20be32cb99fdd14c775937e69189687edc0bccc76f0c821a28de70d16f626a52
font_01_sfnt_off0000bdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB6 9820 bytes
SHA-256: 45d74ad3756eccabf1c16a8dcae587e9eeea079d99b3f96b938eb0a82befde20

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