Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe47e5d3996797b…

MALICIOUS

PDF

64.0 KB Created: 2020-11-22 13:09:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1c14f34d5c988b56b0ee676ba64005a5 SHA-1: da41bc53f1ef199cb57ce69c050741c4c5e48a48 SHA-256: efe47e5d3996797b1b89329ed8f4d786caadbf30e059f820da992f91348100ce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 5

  • 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 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://traffnew.ru/123?utm_term=btd+battles+unblocked PDF link annotation
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/denivelujawifajevezu.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/xizowapewipilaxat.pdfIn PDF document text
    • https://nugaginidej.weebly.com/uploads/1/3/4/4/134475369/9910762.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/papitila.pdfIn PDF document text
    • https://baxovazexozubuv.weebly.com/uploads/1/3/4/3/134318553/f27693b9b.pdfIn PDF document text
    • https://gojefofowuf.weebly.com/uploads/1/3/4/5/134596001/tazidovaguza_rakadumazijepen.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/guxosa/django_form_charfield_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51adda60-7ec0-4f39-9dd9-218c3a87beea/lopiwukinaverazokiferatot.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/civil_rights_movement_crossword_puzzle_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/73865889850.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/pathfinder_tian_xia_classes.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/apple_in_puff_pastry_recipes.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_off0000c1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DB 5088 bytes
SHA-256: 5b2c3dc0466944590452093c23e6aea684f18bea5cde10a7cbdeb84ba559e8b9
font_01_sfnt_off0000d33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33F 9344 bytes
SHA-256: 8783f23adecfc6a73e284492a24d0411f91748626562eb5546234cdad97d0fd3

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