Malicious PDF — malware analysis report

Static analysis result for SHA-256 80db692920614832…

MALICIOUS

PDF

73.9 KB Created: 2021-03-12 00:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad10ebe3c1aed8de0ded72d6e15f775c SHA-1: 16df67b50f0f301ac439c902e7a65cba742f4cd8 SHA-256: 80db692920614832197255852113c547485353a7a373530eb66ade2d53d5fa61
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

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://botokaw.ru/award?keyword=redact+pdf+acrobat+pro+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389568/normal_60220a796bc4d.pdfIn PDF document text
    • https://mijonogopo.weebly.com/uploads/1/3/5/3/135327524/2d905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456985/normal_5ffd986e2125b.pdfIn PDF document text
    • https://degexaxi.weebly.com/uploads/1/3/1/4/131406510/be4a4a.pdfIn PDF document text
    • https://kunubixofatefif.weebly.com/uploads/1/3/4/0/134096788/d2b97de46801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_603bd3ebd99d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fd7de214d517.pdfIn PDF document text
    • http://xurivikarode.iblogger.org/gta_wasted_sound_effect_free.pdfIn PDF document text
    • https://ponadolofulofuk.weebly.com/uploads/1/3/1/3/131398561/4eca85d2efc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444655/normal_5fe1293d458ce.pdfIn PDF document text
    • https://mufaguzesevulet.weebly.com/uploads/1/3/2/8/132814956/botexumubejenibut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_2c8f2d60dd69424a9480abfc0df2f3c0.pdf?index=trueIn PDF document text
    • http://lumigetutiburu.epizy.com/55766011391.pdfIn PDF document text
    • http://wodixosikomo.rf.gd/predictable_revenue_summary.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/cement_industry_in_kenya.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_26b60d695fdf4ecdad678ee6422881d4.pdf?index=trueIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/what_happens_when_you_exercise_for_30_minutes.pdfIn PDF document text
    • http://xikusaduxofi.atwebpages.com/how_to_put_punctuation_in_dialogue.pdfIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_b680a2cb6e7c47869aac533b5b7fdac3.pdf?index=trueIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/nato_phonetic_alphabet_quiz.pdfIn PDF document text
    • http://merujepapi.epizy.com/lexemosivixowemum.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_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 5360 bytes
SHA-256: e0e1cbd39903af00803b009052203528e6f2ef3e99334eb5a295310e22cc56cc
font_01_sfnt_off0000f7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 10184 bytes
SHA-256: 7bd6383b092379618c4da4a8ea1cbb6b3bae91612cbaedf0556e2bedb2f2cd95