Malicious PDF — malware analysis report

Static analysis result for SHA-256 12965b4056bec55a…

MALICIOUS

PDF

72.7 KB Created: 2021-02-25 17:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9749002fc11ce786ec22a91cd89f85ba SHA-1: 49c44366dfe399e568321bc899ab3afa9bbf41fb SHA-256: 12965b4056bec55ab84cea9eaf5279be9a2283856c9372484663dc3281a359be
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=read+new+warriors+online PDF link annotation
    • https://cdn.sqhk.co/viwiratoposu/hcgjiZi/cat_pinata_halloween_costume.pdfIn PDF document text
    • https://cdn.sqhk.co/telapunojawu/gdsicoy/bullet_rush_ak47.pdfIn PDF document text
    • https://cdn.sqhk.co/gotulurowav/qAiaUih/verizon_content_transfer_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/simubekoz/cQjggg8/59355479038.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/Mkrifke/wigegalujew.pdfIn PDF document text
    • https://cdn.sqhk.co/botikavanov/hjxf9TM/14308959958.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/jad2icw/cosmopolitan_las_vegas_hotel_and_flight_deals.pdfIn PDF document text
    • http://rujawobezixevib.iblogger.org/99303399883.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hsaXvjc/mamoredewipagizimesarewur.pdfIn PDF document text
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/1112304.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/tudawufed/larudexovusagowuziliden.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/calculus_logarithmic_differentiation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/gudazaku.pdfIn PDF document text
    • http://sogefotatuledis.epizy.com/1351783734.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_off0000d600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD600 4624 bytes
SHA-256: f5f31c643a98da735b79681a2b3d8f961f4eed9f11b15c0a4dfc55c6c42bd97e
font_01_sfnt_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 9988 bytes
SHA-256: b34edf313dd9e1048334ea05d739aa4de31c0ea7aa8aa169f66c37b52ee26e51
font_02_sfnt_off000107eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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