Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b58fb906eca8f8…

MALICIOUS

PDF

69.9 KB Created: 2021-03-06 02:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c275c1c3913f2753d4a0a37078f0c956 SHA-1: 90827b913a59f7951e0cdca4558a2ae98a2b12a5 SHA-256: 51b58fb906eca8f80b8c82312a7862457d1a7c860d0f4a1aa341eb70be24b5e6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/award?keyword=akta+pure+fraction+collector PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406169/normal_5fcd606e5754a.pdfIn PDF document text
    • https://posesisex.weebly.com/uploads/1/3/5/3/135332701/lapinitevirizopu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418587/normal_6000042ebf861.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/irobot_roomba_s9_black_friday.pdfIn PDF document text
    • https://zazozoke.weebly.com/uploads/1/3/0/7/130776388/bukuzesovil_xilurefumuleta_guvomora_duget.pdfIn PDF document text
    • https://cdn.sqhk.co/mevexobuzur/eifhege/talion_shadow_of_war_fanfiction.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378381/normal_60045b4e72025.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/samsung_ah59_remote_tv_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_60387057af821.pdfIn PDF document text
    • https://vororesefuvemux.weebly.com/uploads/1/3/0/8/130813496/mewuzepa.pdfIn PDF document text
    • https://cdn.sqhk.co/wireriduwude/X3jchgT/weight_steel_plate_calculator_metric.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/piwobipabozedo_ruperaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500878/normal_603df38f652fe.pdfIn PDF document text
    • https://ditiwuta.weebly.com/uploads/1/3/1/4/131483603/022829df29d85c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulozor/escape_room_game_level_174_answer.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_3175e6c6ab6448dc9017086417653cea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/jubet.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/jax_jaguars_injury_report.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_a0e26029c4b145cabe66616686657c73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/21563154025.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_9e146d694ab048e29f08aa1132ac78e1.pdf?index=trueIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_c88757c0c6c7476ea15697f73863af07.pdf?index=trueIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_3b381c155c5c4a79a4830f160df5931f.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_off0000d67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67F 4884 bytes
SHA-256: d4a046d811f7c67b1df0f4b26160b8cd063b91227605f297c6a332d1ccccea81
font_01_sfnt_off0000e735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 10268 bytes
SHA-256: 6984bc3d422ab4c114efeb1f2dee3548427332b6b00c1c2d89ebde67eb91c662