Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a827b3f819337d…

MALICIOUS

PDF

68.3 KB Created: 2020-12-10 17:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 947eeb6c02441b63afab8a46a799abdc SHA-1: 1487110044eb3cce5b0c102bfa248ac5d6b6732f SHA-256: 08a827b3f819337d265f7f1604e01e27c355ae02adaca5da50049f9d6aba72e4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded links likely lead to malicious content or phishing sites, aiming to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/123?utm_term=allison+trans+codes PDF link annotation
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/jowerim-mojosawoju-kajidejelowozi-bitum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5fbc9ecd51713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5f891c86ea497.pdfIn PDF document text
    • https://mifugitosa.weebly.com/uploads/1/3/4/6/134631290/nubigevodubelixiduj.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/dogazisuze/bertha_park_high_school_uniform.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf2cc74d27a447098b2043/t/5fd19a628ba64b78df50e250/1607572067445/wusufowimotekal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e46f24b06a7eb3ff1788/t/5fc2b57a4e98326c0269b511/1606595962109/54351677794.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/sutitonumotalew.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc174e7bf71053ccb141a2b/t/5fc2bf5ee18c5c478e55fbde/1606598494131/microeconomics_notes_b.com.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79d8e382bec7399f87be1/t/5fd1f0725e090321cab6d299/1607594099377/dabetilejuwoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfceb2c14dfd36feeb11ef/t/5fc15ded08845d0924bda3b8/1606508014749/mutants_and_masterminds_3rd_edition_adventure_modules.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_off0000d197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD197 4924 bytes
SHA-256: 2562fac0dec59ee1f270e1a0fddf7c8255722340ed63e09022dd20fc8c39b4d5
font_01_sfnt_off0000e260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE260 10128 bytes
SHA-256: dd07073030ff78998828282a7aa0305bfb91c5d4f845259e7f4fd801dffc55be

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