Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ef6dcaaaa9fba9…

MALICIOUS

PDF

76.5 KB Created: 2020-11-11 23:35:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a6d97d66ae9d0049dd70662aa8390ed4 SHA-1: 46b6378028b66dd4b9fdfe181cf0ba582ebf3d88 SHA-256: 93ef6dcaaaa9fba988d12e6b9cb039382a0d5227790187221fd6c195d48c5154
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 0.9998

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://gettraff.ru/strik?utm_term=shadowrun+sixth+world+almanac+pdf In PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/4297492.pdfIn PDF document text
    • https://vebeviwikime.weebly.com/uploads/1/3/4/3/134317270/5044869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f87085b1619b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8aa8b2267ac.pdfIn PDF document text
    • https://ginefudev.weebly.com/uploads/1/3/4/4/134454890/digibakav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448328/normal_5faab42789cc7.pdfIn PDF document text
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/witipaxaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451757/normal_5fab012c77a91.pdfIn PDF document text
    • https://vupubajuxik.weebly.com/uploads/1/3/4/4/134492473/tisepapatumix.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/nimuwet/kiwirabomerodipunusi.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/download_chromebook_os_to_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dbb818-34e1-478e-8c32-0ba0ec6c5954/flavien_allenspach_und_sabine_dahind.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/questions_to_ask_thomas_jefferson.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/bwv_1056_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/thorium_mod_healer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/dilotiwumaturemuzefipaduk.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_off0000da6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 5424 bytes
SHA-256: 05c5297e910a0e6c5214c949fcbc7ef751b9b515346f52297295213d8bef3dba
font_01_sfnt_off0000ecb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 13720 bytes
SHA-256: 0d47610ea3706118d529fdda05e45f9845b3b14d2a8ed505aebbea0c8521ae24
font_02_sfnt_off00011719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11719 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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