Malicious PDF — malware analysis report

Static analysis result for SHA-256 2212909d353fec05…

MALICIOUS

PDF

76.7 KB Created: 2021-04-04 08:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 137e0fd896358c67a14e066422d20457 SHA-1: d7983f42c800c77f970b0c95b560fb82778a50eb SHA-256: 2212909d353fec0523fbca32eb77275e3fb1e9919cd43d7e5d9f80de554099ac
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs points to the document's primary function of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • 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://gimoguvi.ru/award?keyword=cctv+camera+system+learning+pdf PDF link annotation
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/85f43501acb.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/hj7rjcS/xemoreduzofavofedigokolor.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/yheCvhN/big_game_hunter_hearthstone_nerf.pdfIn PDF document text
    • https://vosifiteke.weebly.com/uploads/1/3/6/0/136049758/2286309.pdfIn PDF document text
    • https://kofukupapakube.weebly.com/uploads/1/3/4/5/134586312/pigezudekuten.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_5fe9f51c66241.pdfIn PDF document text
    • https://vimedijo.weebly.com/uploads/1/3/1/6/131606629/e30ca76792a1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374715/normal_603b13227ea15.pdfIn PDF document text
    • http://fawotewikobafis.iblogger.org/google_cardboard_vr_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/nefikelifu/aWay2It/happy_birthday_gif_for_him.pdfIn PDF document text
    • https://zedurobarudavur.weebly.com/uploads/1/3/4/0/134018347/5580410.pdfIn PDF document text
    • https://lisewukalog.weebly.com/uploads/1/3/4/4/134435391/fatipokira.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_6006603a6fa28.pdfIn PDF document text
    • https://cdn.sqhk.co/fedijadika/haifgjx/nimekilaxawofogowagadod.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/6e32bac16e3e3.pdfIn PDF document text
    • http://pudavepen.iblogger.org/bovawategofuzabovuga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463272/normal_600021dcd8fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447903/normal_601063681c8eb.pdfIn PDF document text
    • https://bapixive.weebly.com/uploads/1/3/4/3/134393773/raxufot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ab3e2d-d509-47b2-8532-ab279d5f236b/12342319377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02de193f-d1e8-40a9-8a2d-b790f2b644ed/saretuderazeledawofozowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8494c9-c9ba-4d3e-b238-a088c1359239/gemamixun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c475192-d9d8-4cd1-b7ea-8c71e328ef8b/kivodexuvabi.pdfIn PDF document text
    • http://nebosudigijo.rf.gd/34625871065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a6ce450-30dc-49b6-b4ff-861715abac0b/zasusizupajitosibesa.pdfIn PDF document text
    • http://menenig.rf.gd/bifemuburewapu.pdfIn PDF document text
    • http://buximonerivib.epizy.com/axel_vervoordt_living_with_light.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 5540 bytes
SHA-256: cdd6b9faeb152fb8121db8d006c0f5ff244199906ce5be616ed39d5b830e4364
font_01_sfnt_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 10596 bytes
SHA-256: 0e4096e838d50c35a9d0bd80b0973f01642ac26ab8ba5d5213b6a520bf3575cf