Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76806a3faea48e1…

MALICIOUS

PDF

74.1 KB Created: 2020-11-27 18:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 777728d33eb13c06af8fe9040acd7010 SHA-1: dbf9a455ae1240fedba5ca8ee0818350b43f3f44 SHA-256: e76806a3faea48e1eae8d192a22f12e3a65a6497d29bc440edc79ccbc4cc3883
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 0.9998

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 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://trafffe.ru/123?utm_term=trek+mountain+track+800+parts PDF link annotation
    • https://ponixetuga.weebly.com/uploads/1/3/4/6/134668384/8825ec671b168d2.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/makexidatedipozip.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/molivopem_bamovuborum.pdfIn PDF document text
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/7412893.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/3752782.pdfIn PDF document text
    • https://mavusuwavonim.weebly.com/uploads/1/3/4/4/134493404/pabosoxazaw.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/goxarujemexogu_mosegozivi_fofuwad_kezobal.pdfIn PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/f02439c9de141.pdfIn PDF document text
    • https://fowaloxew.weebly.com/uploads/1/3/4/8/134881160/teripibo.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/nagusijudubapope.pdfIn PDF document text
    • https://mosozedap.weebly.com/uploads/1/3/1/8/131856454/4454854.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/silubebebefuju/common_nouns_and_proper_nouns_worksheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/fikato.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/coffee_break_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/cc2_chapter_9_answers.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_off0000e251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE251 5396 bytes
SHA-256: d19949c7fd84bba6b48a130faf61f4abac90a77a495015ef1607090940d53bcd
font_01_sfnt_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 11508 bytes
SHA-256: 593aa827ee48c7d3da633bd0d971623fbd91038f0f7b221cbf42f46b5d6c2d87

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