Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17f31e5008d3375…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 22:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6bf426a84be6731452c69e120eb81edb SHA-1: a4c52a122f2869de115c38e9db8c57d5e76da78a SHA-256: b17f31e5008d33757761de3c24a3b382b9f00b528519e5d1526d4e8acaff383d
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting and appear to be part of an SEO link farm. The document body, though heavily obfuscated, suggests a lure related to a 'strategy guide'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO spam or to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=mario+kart+wii+strategy+guide PDF link annotation
    • http://saudiautoinsurance.com/16415112311e6l5d.pdfIn PDF document text
    • https://mogeletonedilo.weebly.com/uploads/1/3/1/4/131482944/3562610.pdfIn PDF document text
    • http://akmurzina.com/how_to_find_the_andromeda_galaxy_in_the_night_skyvurga.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/n0ChiSF/make_a_face_mask_at_home_nhs.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/f57aaded.pdfIn PDF document text
    • http://e-devletodeme.net/camera_lenses_for_dummieszlkvo.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/sefgggf/auto_chess_war_mod.pdfIn PDF document text
    • https://zepigebilotexo.weebly.com/uploads/1/3/0/7/130739401/tekusegu-vowisasimuvufu.pdfIn PDF document text
    • https://nuwaruwavup.weebly.com/uploads/1/3/4/3/134362645/96c8fb.pdfIn PDF document text
    • http://neip-forum.fun/dafagac1jk.pdfIn PDF document text
    • https://godikifamubexi.weebly.com/uploads/1/3/4/6/134622632/6167348.pdfIn PDF document text
    • https://cdn.sqhk.co/vofemolat/hcaif9E/73750852287.pdfIn PDF document text
    • http://mamunetosi.iblogger.org/allerseelen_richard_strauss.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_d5d0aeb5727d467f9eb4487ed5b08970.pdf?index=trueIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_9af8e332e0864c73af2773d719d5f1c2.pdf?index=trueIn PDF document text
    • http://lefumes.rf.gd/craftsman_briggs_and_stratton_platinum_190cc_wont_start.pdfIn PDF document text
    • http://kexobub.rf.gd/fikavotinaxemorumaxagu.pdfIn PDF document text
    • https://ad060920-74d0-4a59-a46a-f478898ed72a.filesusr.com/ugd/a7c1e6_9499d954dd214ddb8db2041fbcbdad5d.pdf?index=trueIn PDF document text
    • http://bolozoros.rf.gd/lo_que_no_te_mata_te_hace_mas_fuerte_pelicula_critica.pdfIn PDF document text
    • http://riwesanis.epizy.com/jack_reacher_never_go_back_tamil_dubbed_movie_watch_online.pdfIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_56fd79a173104e30ae17ec87107e03b7.pdf?index=trueIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_de80d046154b40a68798b7a983a6622f.pdf?index=trueIn 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_off0000fa9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9D 5224 bytes
SHA-256: 58e9b99300d3713f95d7c9fe828672cb75274fa08ed00003df770b2a987fec8b
font_01_sfnt_off00010c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C94 11180 bytes
SHA-256: 321d5e4145c831a7f63a74cf68bcb8e79eddef2f8dac5b0df6123581c4e0dbac