Malicious PDF — malware analysis report

Static analysis result for SHA-256 20980eeae81a2c30…

MALICIOUS

PDF

74.9 KB Created: 2021-03-19 21:27:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4c058bb1d36508aee911ed0d3b6e2f9a SHA-1: 0a4bac4daf831607f40fa1dbaa96a2a87f1759c0 SHA-256: 20980eeae81a2c30d4468fd56841c255a2c2cbedd5d0c677121e17dc3cb7f755
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though partially corrupted, includes metadata related to its creation, but the primary malicious activity appears to be the extensive use of external URLs for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://jumiwimov.ru/award?keyword=catalano+colori+pdf PDF link annotation
    • http://bolowaxo.22web.org/assessment_of_learning_1.pdfIn PDF document text
    • http://thelandofbadideas.com/hays_salary_guide_2019_irelandsy34f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_60338216ebe97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485321/normal_604e8a21db54d.pdfIn PDF document text
    • http://50offit.pro/35066155498h2bvs.pdfIn PDF document text
    • http://rejuxipo.iblogger.org/39413652935.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/how_to_put_ge_washing_machine_in_diagnostic_moderrb4f.pdfIn PDF document text
    • http://trokot-shtorki.online/the_curious_savage_scriptm4iha.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://s3.amazonaws.com/jeduzizonox/xisopujotuneferikapepon.pdfIn PDF document text
    • https://50c84cdf-c8d4-407e-a307-361b94491100.filesusr.com/ugd/f2656e_a15d22b1488a46b8965549021183ccf5.pdf?index=trueIn PDF document text
    • http://jonegukum.epizy.com/zapakod.pdfIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_6ffc8b4219c548bf95aba59af0cede84.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jexijer/collage_maker_for_windows.pdfIn PDF document text
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_64ab4de5f07144f387237356f2a58031.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_661716daec134797928685da9d2b8626.pdf?index=trueIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_f2c9ab0c44fd492abe07c1606fe0bba7.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_341377fa80b24bac8c7e3bbf67bc6def.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/lagu_perbual_averiana_br_barus.pdfIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_1514c667f73348cab5a7590f645e9d89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/best_antivirus_for_android_mobile_list.pdfIn PDF document text
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_5af60ac04f694d3a975d39e2ad219a0d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimepusox/feedback_form_template_word_doc.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_b2ba4fc27fe2452da40d5e582e1b1062.pdf?index=trueIn PDF document text
    • http://robipurovunox.rf.gd/appelle_moi_par_ton_nom.pdfIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_30d3dd5c1d08432988f05ea785fca486.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 4664 bytes
SHA-256: 09c06a68e4c30234eb8b59901deb99f260adc2bef4be47e52373cd9441862e29
font_01_sfnt_off0000e9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DD 11580 bytes
SHA-256: f02eb570294a60fa584242eb054c1b8fe1505636400f25c133c1c924a6a85c1a
font_02_sfnt_off0001106c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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