Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de54b088f28e2f9…

MALICIOUS

PDF

72.8 KB Created: 2020-12-10 11:35:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 323b100475a467b6bd99673c8c490f12 SHA-1: 2da072e3c8868a459c6485d9e9d59930ab980da5 SHA-256: 7de54b088f28e2f9636c989d113fdf91c968bcc0a63c31c561192eb3d112f8f2
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://ggtraff.ru/aws?utm_term=bws+blockade+%25C3%25BCbungen+pdf', suggest an attempt to direct users to harmful sites. The presence of numerous PDF links further supports a link farm or phishing campaign.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=bws+blockade+%25C3%25BCbungen+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448323/normal_5fb9edbc645fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409239/normal_5fc3b8376da5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f9b44bc89e63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_5fbf176c0e77a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393779/normal_5fcdd0e24aa8f.pdfIn PDF document text
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/moromasazirokevur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc578bb92c50b1a1e9652c3/t/5fd149aca3ae4c72e4b9cac5/1607551415976/talking_tom_gold_run_2_apkpure.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d0859698b02c7f425fc5/t/5fc9f55087b36f46d403b4f8/1607071059715/vedupuwematefobagoro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc546b6a13a450bab114660/t/5fc7e5a866d87000d3c393e9/1606935977117/54602737987.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6489b16f6d44b07e34629/t/5fcad1ef1ef6d1662fe13762/1607127536336/top_10_telugu_ringtones_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d6c88787e879896ba956/t/5fc2d1d1fa04221c717d1f40/1606603218039/online_tax_comparison_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4df99ee0f32b874a1824/1606372858577/bawikosalan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5208abda9c57a97d98c8e/t/5fd14f2cf09ee25c6a955627/1607552814047/facts_school_philadelphia.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_off0000db46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB46 5692 bytes
SHA-256: 5c7349be961a3cfd87befb5f9f8d59a634b95fd8c9e98265887665d51b7c608b
font_01_sfnt_off0000ee9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 11760 bytes
SHA-256: 9e794a6a2aacaaf5a4c01b67c691e8c70d83b303bedec05d3553290faa63142b

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