Malicious PDF — malware analysis report

Static analysis result for SHA-256 7281666c47898441…

MALICIOUS

PDF

75.7 KB Created: 2021-05-18 18:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: dfbd1edd999380db54691f3f9775f247 SHA-1: 7bac81556e7dd768a7031539569d8c0c1746be4a SHA-256: 7281666c4789844114db31c9fa5ea96a95d374b1cf8f25af989987fb057bfc20
186 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 0.9997

Heuristics 6

  • 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.
  • 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://soxebez.ru/wb?keyword=john%20deere%20js40%20engine%20diagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454684/normal_5fddf53e2322a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_604a8475b2b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_603796e770a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465007/normal_600cee0db8b01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_5fd288c65e8fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_600f08260f6d0.pdfIn PDF document text
    • https://kagamufoxigog.weebly.com/uploads/1/3/4/0/134013308/soxubonabob-gidujutemuxod-levus-tebogeka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369322/normal_5fe5a52dd5b40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378390/normal_5febb5e792891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449996/normal_5fe72e2346ee8.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/8e68895bb419e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491927/normal_606c83522d939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407327/normal_6002d822d4477.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/sexamumux.pdfIn PDF document text
    • http://pimolala.22web.org/32995507479.pdfIn PDF document text
    • https://fugogifozu.weebly.com/uploads/1/3/4/8/134888696/cc7f50e6576bd0.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/bogeguva/awaiting_your_response_formal_email.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/54606043140.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/quotation_marks_for_dialogue_worksheets.pdfIn PDF document text
    • http://loxometos.epizy.com/21842661537.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 5504 bytes
SHA-256: cc4de05fe0fffeb3f7df80dbb4d65faef6b81a3658cadb3648d4321517144a91
font_01_sfnt_off0000fcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 10872 bytes
SHA-256: bbeadede41c9382913d4db276c05f7fa4a3be258acaa4ee94727016e2b54fff1

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