Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6dda11379a60057…

MALICIOUS

PDF

76.0 KB Created: 2020-11-16 13:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e57cc8537d08ae76bd61093104b82684 SHA-1: d12d053b7ed738908e54183e10c5a3efc4512608 SHA-256: f6dda11379a60057b944c3c7179dbb5d26038d9c07370b4b8b9da387f16ce8cb
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?utm_term=harry+potter+words+per+chapter In PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/lojekavimasow_gireka_jubov_mamejixuxude.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/vegutafekopeberadan.pdfIn PDF document text
    • https://gubojipupulep.weebly.com/uploads/1/3/4/3/134359502/e47b64f2fae05e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_5fa397ba06614.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/wutowopariw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f8e33e1eb029.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sisaxu/96707795640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d887eb04-603f-43ab-9f6d-eb716fe09caa/71409287354.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/rabevoluzivujugol.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/78620457783.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/dexigigijuzirukiv.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/wupiril.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/ironman_farming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/good_bill_ideas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 4916 bytes
SHA-256: 117e812caceecad8c43efd70a6cf1858b47820e78c08790b7a88886b36f44ac8
font_01_sfnt_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 10908 bytes
SHA-256: c6a1d08b6a0c6bbc6605971f4f996b5a953e248294102345d77ef5011e3c7528
font_02_sfnt_off000114cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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