Malicious PDF — malware analysis report

Static analysis result for SHA-256 0930b73577ecf84d…

MALICIOUS

PDF

67.3 KB Created: 2020-11-17 17:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f5e0ee6b835a6255d46099411d28cd43 SHA-1: b768033b55c58a0c6e163d33a9f74fcf7e10fe70 SHA-256: 0930b73577ecf84d93db3d83299fbb2134e1976e9faaf60c2ed1c16056e6f872
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and a link farm. The document contains numerous embedded URLs, with one prominent URL pointing to a known malicious redirector. The presence of a link farm suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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
  • 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://cctraff.ru/123?utm_term=gaming+table+plans+pdf In PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/sijalekikewajuj.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/bfaf9.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/d86cda08-6b4c-4452-99ef-13c2d2a30bbb/hemi_performance_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856a86ba-ac31-41eb-a37c-102c7ba62c00/lutilatibo.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/rixaxiperifagasonaxexusid.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/19559737676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b315cc6-b53e-4d0e-81c8-fea5c7fa50e8/xatogelatobugil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18093028-c2ed-4e2c-be20-1cd266625f0e/chefs_choice_110_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32b55af-8c1c-47d3-9ef4-a03ccaf7a79f/wuwuwajoxalinozut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039f4c40-98c3-4407-b204-44f81d443d8b/thomas_calculus_14th_edition_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638e4f88-2447-4514-86b9-220d678aaf58/yurok_tribe_food_for_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1aad5d4-3c0a-426c-bc69-f50f874c8e56/52652926111.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/fitbit_charge_3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d5926e-ee20-42b2-aa10-dcedcb5dee22/97758824953.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/ramirexijosuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6c1afff-05a0-4a4e-be69-0d612ed96b92/68553538388.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_off0000ca21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA21 5436 bytes
SHA-256: 35a12257456074d0bb99124339e71fd12f9fe4dc7c5c8d7a3bf8e65bb6c5935f
font_01_sfnt_off0000dc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8D 10544 bytes
SHA-256: 9034905f6153b4f543b622f7754685103c27311c1684cf7447856348e29a5b50

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