Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e0cd03da3e87f9…

MALICIOUS

PDF

85.2 KB Created: 2021-03-18 04:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1f724d230089b856d18d8b45b30f7624 SHA-1: 112f6b8fd3fc5810039cfe07f2a98f4fba34424a SHA-256: a3e0cd03da3e87f9a3a8af7bff36b76808454dffb2f4213dfc9f7fc290cfcd75
156 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 0.9996

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 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.
  • 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://dafemum.ru/strik?utm_term=mamiya+rz67+prism+finder+manual PDF link annotation
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/rekoxuf-wijiwepevuxemi-fozafizazuz-bifovadabug.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/2402264.pdfIn PDF document text
    • https://sorudexene.weebly.com/uploads/1/3/1/3/131384015/wopofewuku-sijelebez.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/motogoji-jibupevol-lulolekojuwixa-kepif.pdfIn PDF document text
    • https://zuwufapiju.weebly.com/uploads/1/3/5/3/135348861/a61fc0f.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/cgiifjd/stickman_football_the_bowl_mod_apk.pdfIn PDF document text
    • https://gudeworidive.weebly.com/uploads/1/3/4/7/134767917/ead0e7b1.pdfIn PDF document text
    • https://guvoxokogavi.weebly.com/uploads/1/3/4/3/134374443/todekofakopab_fizova.pdfIn PDF document text
    • https://diwejixa.weebly.com/uploads/1/3/4/6/134629966/sebagodeje.pdfIn PDF document text
    • https://ragesetenavuxom.weebly.com/uploads/1/3/1/6/131606186/5959982.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/telubukedilomun.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/geYicgi/23632466175.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/jipowumat/gmp_guidelines_for_veterinary_products.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_3920e69617be432c9336a2dcc7f799ae.pdf?index=trueIn PDF document text
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_5da04d71b4854a00989a5a3760d27b7f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/netinuwa/sao_crossing_field_piano_sheet_easy.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_3d90414d2d844cf3aca59558d3efc5f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farokof/84727705537.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/game_android_apk_data_obb_offline.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_7ec50ed238a34dc897e9efc4f0a4e295.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/32037790294.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 5580 bytes
SHA-256: 0a6d99416b6cc7fc2356dd85082dd9423b80dd9820dc7b1f92d41f5e30bcb930
font_01_sfnt_off000117f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F6 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00012086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12086 10748 bytes
SHA-256: 8e966ea5986bf49e5424c4d77f9aee8ddbb2ee7eb1bb624ca3f84c8c15021f23

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