Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf025dd4beb21513…

MALICIOUS

PDF

75.6 KB Created: 2021-03-12 07:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ddde758d572816673c980b8f7ee6065f SHA-1: 39c6e197117cebc322e56ce42a56f9e6fd66437f SHA-256: bf025dd4beb21513cdc651bbf1df8090baca4f84e46e8024b46bf18c85c47634
194 Risk Score

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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=pdf+to+dwg+converter+online+converter PDF link annotation
    • https://porilijure.weebly.com/uploads/1/3/1/6/131606314/tifolus.pdfIn PDF document text
    • https://cdn.sqhk.co/zawukomofise/iifXhgm/kids_kitchen_set_ikea.pdfIn PDF document text
    • https://bokesaxigalul.weebly.com/uploads/1/3/0/7/130776824/wonanu.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/jbhjzgg/world_war_heroes_tips_and_tricks.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/jhVTujf/voice_assistant_for_android_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/nefikelifu/cLha28g/little_alchemy_2_cheats_plant.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/1606275.pdfIn PDF document text
    • https://finaxapiw.weebly.com/uploads/1/3/5/3/135301963/8f38746b.pdfIn PDF document text
    • https://rolarijigajegij.weebly.com/uploads/1/3/1/4/131438579/vukakuribinumosi.pdfIn PDF document text
    • http://instahelpforbusiness.com/best_penny_stocks_to_buy_listxpcqf.pdfIn PDF document text
    • http://frankiearvelo.com/how_to_get_dividends_monthlyx6go1.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/Pvshhhj/nirukami.pdfIn PDF document text
    • http://blog-millionaire.buzz/doferorebih16fh.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/jahhjb2/98653437115.pdfIn PDF document text
    • http://fakts.design/112563831173wqa7.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/31390046032usue2.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/hgfG7ih/harvest_church_atlanta_ga.pdfIn PDF document text
    • https://cdn.sqhk.co/judigirowe/3reQjhY/46206249316.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/bIjfb5B/worifezafadomavefimo.pdfIn PDF document text
    • https://jagevugabawe.weebly.com/uploads/1/3/4/6/134631244/1525635.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/1510147.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/mgcghuJ/m64plus_fz_pro_emulator_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xizemeginu/oTw2icA/zatiz.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/jj5yjhy/gigebeginokodav.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_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 4956 bytes
SHA-256: e216ddf67d5ad52c3aa6753a66e187594df78a4ef3aeb86e9a3e405e6a53e9a3
font_01_sfnt_off0000fdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF8 10208 bytes
SHA-256: aeeeb5892c6bcfbd493203a41fdfd72eceb438a7ea06c755581f7e25ea5b8ca2