Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad99ee2606b7382…

MALICIOUS

PDF

94.0 KB Created: 2021-04-04 13:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c48a94d3330dfe18a3cc18c1cb7e24d9 SHA-1: 9fbcb550a3e4c1e97151500b996e4842ba062e15 SHA-256: 6ad99ee2606b73821b07882bebcf4caa48aecf3fae9189d980c5e100891c4de9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The primary embedded URL, 'https://botokaw.ru/wix?keyword=pathfinder+player%2527s+guide+pdf', is likely intended to redirect users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=pathfinder+player%2527s+guide+pdf PDF link annotation
    • https://fanejutasoja.weebly.com/uploads/1/3/5/3/135399707/nevura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482638/normal_605f47585c71f.pdfIn PDF document text
    • https://xanuvomapimiv.weebly.com/uploads/1/3/4/3/134342034/wesera.pdfIn PDF document text
    • https://jizojalagakamu.weebly.com/uploads/1/3/4/8/134886497/7928449.pdfIn PDF document text
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/morozajavel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5fee0e9207ebf.pdfIn PDF document text
    • http://solifixogalek.mypressonline.com/81245046769.pdfIn PDF document text
    • https://zetizisoxaw.weebly.com/uploads/1/3/4/4/134498522/napuvorazigan-vejipitatowe-refuzotegafito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489979/normal_5ff895dce9106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_6015887334ea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_603d8974e22b8.pdfIn PDF document text
    • http://bitiwiz.medianewsonline.com/99572551589.pdfIn PDF document text
    • http://xegisepereti.mygamesonline.org/synthesis_of_phenyl_benzoate_from_phenol.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/jobavo/32163172727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6004785d-9d4d-4aaf-b95e-cbb283626e1d/how_to_find_the_height_of_an_object_by_its_shadow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b930a539-6804-4185-85cc-6de3d061498b/the_possibility_of_evil_multiple_choice_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/baketapikibo.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_b836061ebe014f00a3ad0ccb58ea303d.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_6535c8b3e7b94ae7a0dae2ac0ce57471.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_85ff9154e80749dcb71246f36b536ebd.pdf?index=trueIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_da58dd0193e245f69d634d6b676acc62.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_off00012fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA1 5440 bytes
SHA-256: d196cc8c66a07e3ff58d208494474b3264da89bd5ceb9327fb071ba5ec696471
font_01_sfnt_off00014230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14230 11848 bytes
SHA-256: f95f3bb42de61d394c8e5a8760a8a59df84d5a61df94bbd74af6f60c35090e90