Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d129a377dd167f0…

MALICIOUS

PDF

61.7 KB Created: 2020-12-17 15:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1678593f2764f99075a3a01a6cd65fae SHA-1: 74669c44bf719be2d58205fcc821716276b7040a SHA-256: 6d129a377dd167f04e4630bf10984c27e627d38bf27d94b5a6d6abbde6e72e46
214 Risk Score

Malware Insights

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

This PDF file is flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or trojan delivery mechanism. It contains a link to known malicious redirector infrastructure, suggesting an attempt to lead the user to a harmful site. The PDF also hosts a large number of external links, potentially for SEO manipulation or to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=microbial+genetics+ebook+pdf In PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/6190186.pdfIn PDF document text
    • https://xipinirobidojuv.weebly.com/uploads/1/3/4/0/134017625/niboderema-lawirubik-ramijet.pdfIn PDF document text
    • https://datamabijiremu.weebly.com/uploads/1/3/4/6/134691522/e0b14a1c1d.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/47a69ec3-4934-4609-906e-06658e35754e/lusoporusokupuda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc527cf084698658e79f80f/t/5fd1a85c23f2866aa3865fa9/1607575645998/jevirixivupemuvaripuze.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/76901690136.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/mrs_davis_lashes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b90929-bf01-4c3c-b166-2368449cece7/kaatre_en_vasal_vanthai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a9deae-1083-41bd-a295-5c455541ce7a/keurig_cup_holder_drawer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc545c1084698658e7b29ac/t/5fc9514368051c11895a1fef/1607029060241/52130264915.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/28985702867.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/grade_11_analytical_geometry_questions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65358085bf90c0e222242/t/5fc84f5e217b3604edd82161/1606963040186/wood_cutting_tools_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/kutorafovirajopur.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e80068612547ed5e2b99/t/5fc8457290a4f8549d7260a6/1606960499769/cytus_2_characters_unlocked_apk.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_off0000b4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AC 5532 bytes
SHA-256: 789bcf1f892af1dcdf172285fe5fb873e7096a537d867fe4ed2978bf526cb984
font_01_sfnt_off0000c792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC792 10168 bytes
SHA-256: be99299c1ceb0336e802b7e94994fc1e26958c75e21655deb11b0d5a112ffa5f

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