Malicious PDF — malware analysis report

Static analysis result for SHA-256 984edb91bcf8c23f…

MALICIOUS

PDF

67.5 KB Created: 2020-12-04 04:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9106549edc6b5bdf25f395ec7d2a444a SHA-1: 9d43403669fa8f7f65546210d2d964204099fc3b SHA-256: 984edb91bcf8c23f84aca37fabf4b546f5eb614ffa735cb74ebbdaf206740ded
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/strik?utm_term=sportcraft+tx400+treadmill+used+price PDF link annotation
    • https://jigaxokere.weebly.com/uploads/1/3/4/6/134622899/luwafapulakotug.pdfIn PDF document text
    • https://jesezexesupozor.weebly.com/uploads/1/3/4/6/134623998/7057026.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/tesapibebujep/45864517037.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/69692336919.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/widusamo.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/wallpaper_anime_android_terbaik.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/adobe_audition_free_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/16576315775.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/anarkali_malayalam_movie_cinemavilla.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/vapelukusaremutij.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/indian_award_show_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/munebugovokaniripe.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_off0000c6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C6 5704 bytes
SHA-256: cb1607f837de8ed02130a979c6540dd62909976d37213ea53828cc275f30c0e5
font_01_sfnt_off0000da27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA27 11444 bytes
SHA-256: 0671cdeb4c63a118721819471f4246c947e6f9992366e5c83be296bc4ae62a08

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