Malicious PDF — malware analysis report

Static analysis result for SHA-256 380b3d446b4f9713…

MALICIOUS

PDF

125.1 KB Created: 2021-02-20 10:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 32945ec8a4060671ec265a6aa3e1e757 SHA-1: c6c72af79382639661114088a65bc56f0c5f325e SHA-256: 380b3d446b4f971334b5bb8d673b290668ff4422bd86e9a11f5dd805dca13000
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/wix?keyword=uscg+auxiliary+telecommunications+manual PDF link annotation
    • http://fbcopyright-center.com/best_scorer_champions_league_2020umhja.pdfIn PDF document text
    • http://eeuuurrrrr.space/54491705964ttgq3.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/8755406.pdfIn PDF document text
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/2481642.pdfIn PDF document text
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/giwupufuxoravito.pdfIn PDF document text
    • http://itdiscount.pro/6990651274a585i.pdfIn PDF document text
    • https://putepinezuvoko.weebly.com/uploads/1/3/1/8/131856998/3230418.pdfIn PDF document text
    • http://introdom.ru/winston-salem_aaa_officemme65.pdfIn PDF document text
    • http://cg-designer.xyz/learn_how_to_speak_mandaloriant4ihm.pdfIn PDF document text
    • http://biolinkus.me/tukepomufosenupiv93wga.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/2ad03.pdfIn PDF document text
    • https://sotugipuzelaj.weebly.com/uploads/1/3/0/7/130738723/xoporakupir_vewuxafowabif_mukotopol.pdfIn PDF document text
    • http://hyipinvest.site/654197506161v5c1.pdfIn PDF document text
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/tutixoborixuvani.pdfIn PDF document text
    • https://lewozokor.weebly.com/uploads/1/3/5/4/135400983/sosovafojabozas-xutuxumuwire-zaxusodageli-jatimodegupate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001b111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B111 5280 bytes
SHA-256: ad83450b29234caefb4ff3dabca520430994c0ef60f3ef1ca65ec2362ac1933c
font_01_sfnt_off0001c2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2FF 10436 bytes
SHA-256: 46bd1abe2c52724511e53bc2777839758eb14f260598f5aa238ac0eda5ac3cf4

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