Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc0e8bb7163834d…

MALICIOUS

PDF

81.0 KB Created: 2021-03-05 11:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8b4ae99c7d379f2e0330a0f453525385 SHA-1: 2e8f0b39e1e1ea016e0e39d88c3e43583b08e19b SHA-256: edc0e8bb7163834d2a712f46a55d2f206ca6ef41ed398c6b19dd136f01d32994
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, with many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=how+to+adjust+sights+on+taurus+g2c PDF link annotation
    • http://reduslimitalia-oficial.site/how_to_become_a_certified_nutritionist_consultanted2us.pdfIn PDF document text
    • http://zathkatow.xyz/vubujoxudolazuwevinilubutk74uj.pdfIn PDF document text
    • http://esclick.pro/tedoxunurarojasepesajagl30r9.pdfIn PDF document text
    • https://bipilebel.weebly.com/uploads/1/3/1/6/131606150/xoxutixudanunijun.pdfIn PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/delom-kosal.pdfIn PDF document text
    • http://rastet-malysh.ru/el_seor_de_las_moscas_resumen1pzqi.pdfIn PDF document text
    • http://mishabelle.ru/marantz_sr5008_preisg4m2f.pdfIn PDF document text
    • http://avto-trokot.xyz/tamizizuhqske.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411681/normal_6024352b1fec1.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/4992240.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/dividing_mixed_fractions_questions_and_answerska1h8.pdfIn PDF document text
    • http://mosdendy.store/pezuvutarakisegulutigafotohxys.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416935/normal_5fc5c72ddabfd.pdfIn PDF document text
    • http://psychologyrelax.xyz/24752405171mradp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/56439afd-898e-411b-b627-e83e32786e22/lincoln_ac_225_stick_welder_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3427cd19-1cd3-4153-b4d8-bf81bfa03c3c/sat_subject_test_math_level_2_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099ba4c2-58e6-43d6-af28-181b7c0831c2/the_pursuit_of_happiness_chapter_4_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ee217c-39e5-402f-9c57-40473cdd5e1c/69942971681.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_off0001008e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 5432 bytes
SHA-256: 6717553656ecdc5dd8c838aa74003722b798c34df6673ca35ae2dee75f8f619c
font_01_sfnt_off00011315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11315 10384 bytes
SHA-256: 5e1763687f46d8588fce6d6cecad0f09e6152b422a273804784ac23c52077420

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