Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f77e4da97c3e4a6…

MALICIOUS

PDF

80.5 KB Created: 2021-03-29 11:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e4a00514134f5b298b8f19e594f861cc SHA-1: 7ab0e9188d49b21ca1ae06c9ea3ecd4a5ee46b6d SHA-256: 4f77e4da97c3e4a6e936db5484a8971c83cfc4080411c4c6fd838bfb08dbd7c7
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/wix?keyword=uranium+glass+price+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404103/normal_5fd1cdb5e8944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_6024346da042d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483867/normal_5ffbb481c235e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_6049b6c476871.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/ehfLhav/messenger_bag_patterns_for_sewing_free.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/3289472.pdfIn PDF document text
    • http://bilkaita.space/pavaziranarvick.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/if1Htgf/scoop_ice_cream_cooking_game_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/bbS7m2x/granny_simulator_game_free_download_pc.pdfIn PDF document text
    • http://rezolawanelu.sportsontheweb.net/anemia_in_pregnancy.pdfIn PDF document text
    • https://revininone.weebly.com/uploads/1/3/1/3/131380081/wogumanozez_rivomemururoze.pdfIn PDF document text
    • http://katipef.medianewsonline.com/are_michigan_coronavirus_numbers_going_down.pdfIn PDF document text
    • https://ludebopukum.weebly.com/uploads/1/3/1/3/131380916/zanezetuwuvozo-zapar-lurefizokufu-gudunabawulu.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/me_before_you_soundtrack_cd.pdfIn PDF document text
    • http://sadipize.scienceontheweb.net/creative_agency_capabilities_deck.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_601386b8b8bfe.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/gcPhjx3/62866123159.pdfIn PDF document text
    • http://nebo-baikala.ru/selonexukalodop1dyje.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/jiwume.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://uploads.strikinglycdn.com/files/d9ecd96e-ed5b-45ec-8b7d-f34c1abe62f1/37631192659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3fa868-4772-457b-ab67-955362477d2c/shark_navigator_lift_away_pro_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fc9033-4fa2-4813-a257-d7d5593c89af/ruwiwolebalaxotatedaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca43a618-2e01-442d-ad1f-cf581ebace1b/tenenofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89cc88bc-6488-4c7d-aa5e-1f93ca9c3006/74749186625.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_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 5076 bytes
SHA-256: 1644366a1499fb54f28d961435f7b47a244163108247ee802d864e0630209bfa
font_01_sfnt_off0000ffee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEE 11404 bytes
SHA-256: c221ab433ff0d9f46909188f1b01ee8106c5bcbf3d4553c04ebc1842414d2562
font_02_sfnt_off00012697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12697 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3