Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaf6e86318eabe0…

MALICIOUS

PDF

85.9 KB Created: 2021-03-05 05:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8a815b2bb72249582bed0d5db4d0becd SHA-1: 67a8fde4efe3304f908fdf0546fc858a546d24c0 SHA-256: adaf6e86318eabe065d16b15cd10b5e38c18bd805de0a9100b5c479f6eb76586
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URL points to a domain associated with link farming, further supporting the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=climograph+worksheet+answers PDF link annotation
    • http://wifunagidoli.mypressonline.com/libro_gramatica_y_ortografia_basica_de_la_lengua_espaola.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/tokyo_ghoul_chapter_139_discussion.pdfIn PDF document text
    • http://puzofogerexiwi.22web.org/72752181316.pdfIn PDF document text
    • http://retaxigeg.iblogger.org/8772928768.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5fc9ecbbae8bc.pdfIn PDF document text
    • http://jafalule.22web.org/the_guilty_movie_2018_parents_guide.pdfIn PDF document text
    • http://mujazatarotanid.22web.org/rich_dad_poor_dad_audiobook_free_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392199/normal_603f445172ba3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_fabc5f3b809340a18445d523479c15dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8631019f-03ab-4ddf-b6a3-c584be54a47e/somewhere_over_the_rainbow_ukulele_chords_tuning.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/how_to_find_luxaire_furnace_model_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44aed571-6c6b-47e7-a241-dcadf655d63a/85799326931.pdfIn PDF document text
    • http://satuzolo.epizy.com/39332773142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f12bb0d-1f0d-4c71-b3a9-52a48c719663/patufujitabupik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbcfd3d5-32b3-4cdc-9311-3354c6a09be5/bafijodifarag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533f9ab2-9499-48e4-ae8f-3a4a46e9bb3d/94392156912.pdfIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_99f9ca5a9b4546bab160dfc8f218f900.pdf?index=trueIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_6e2d4855af394ad69b89815f42c0292e.pdf?index=trueIn PDF document text
    • http://solatilexi.epizy.com/addition_math_worksheets_for_grade_2.pdfIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_8c602c582e684a37b8755f429d8b6a4f.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_off00011396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11396 5292 bytes
SHA-256: 3c9d0eab03de93fbfa238a3f2ef51c805d1c8426ab15d0bd30004effb666f971
font_01_sfnt_off0001257d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257D 10744 bytes
SHA-256: b63efcfea291ffe59c8013191f5ebdce674c28be445316cc04d20a0148577dbf

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