Malicious PDF — malware analysis report

Static analysis result for SHA-256 118259810247ca03…

MALICIOUS

PDF

77.4 KB Created: 2020-12-02 12:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ecba8d19a1a6c39991036361416d0851 SHA-1: 1dc50fbf89589309026400f383c295f2f9b10b97 SHA-256: 118259810247ca03ea2d4a7527eafdfc5be02866d8e7968e17d08ffc72c83653
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and point to redirectors, indicating a link farm designed to distribute malware or phish for credentials. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://ggtraff.ru/123?utm_term=solar+system+model+project+5th+grade In PDF document text
    • https://pozosukezogi.weebly.com/uploads/1/3/4/3/134386022/vudole-solil-zejozididi-favonaruperesap.pdfIn PDF document text
    • https://zixokamewi.weebly.com/uploads/1/3/4/3/134386319/c8bf3ec3b.pdfIn PDF document text
    • https://xusalowaxagus.weebly.com/uploads/1/3/4/4/134481150/zidafekexupaj.pdfIn PDF document text
    • https://tetegewa.weebly.com/uploads/1/3/4/7/134761184/8186884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5f8be190f29e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_5fc2f28375019.pdfIn PDF document text
    • https://dixaxotobaba.weebly.com/uploads/1/3/4/3/134377978/lomume-nenapetosoxujew-fibemekupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f984c9360def.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f873a5f7a929.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1c697bda9c57a97c4683c/t/5fc3f1bb2dd96f591867d53d/1606676926379/78775426347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b2d8c0-c68a-4771-aca6-068d0b83a7cd/le_guide_complet_du_conducteur.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c7625bcb0228a28e9b31/t/5fc48b1ceaf37e3b642db15f/1606716188351/dekavijipumikabapagun.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/glock_pistols_for_sale_9mm.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_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 5892 bytes
SHA-256: da09bae8fc49c87d1211c67fb1e84eaa16300e2d243a14eb9c3ccb3df052a7e5
font_01_sfnt_off0001055f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 10532 bytes
SHA-256: 440cc9da6f452dbab79220d1c07e1c15e7c5567330289f8eb0346ab9df3efa90

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