Malicious PDF — malware analysis report

Static analysis result for SHA-256 593616cb509612e0…

MALICIOUS

PDF

66.5 KB Created: 2020-12-02 06:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0a3857ca3a7715e4ac9a45aa66c321aa SHA-1: d1a52781f7228ff560d8b66180a39ee47dfaa973 SHA-256: 593616cb509612e03f0bf42fdd7f0b4eccf66968f6c14bd63d63006dec183644
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://traffset.ru/123?utm_term=neighbors+helping+neighbors+near+me', is flagged as suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan delivery mechanism.

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://traffset.ru/123?utm_term=neighbors+helping+neighbors+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5fb839935824b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_5fae096a264f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f89884fc943a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450256/normal_5fc46bc32fdb8.pdfIn PDF document text
    • https://nibuwoxemunovox.weebly.com/uploads/1/3/4/7/134714338/5689007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_5f93c8feb47d7.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/jepinebawo/what_is_affine_transformation_in_computer_graphics.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/call_of_duty_android_wallpaper.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc101f96609fd0ee791e489/t/5fc1c1fce18c5c478e3cea22/1606533635490/the_pleasure_of_ignorance_text.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/imtex_2019_exhibitor_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6683d3c-ec44-4d20-a8b8-375a1766fbab/jejupuzefiwuwe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d900d26ff1194f736c6f/t/5fc2035f9ee0f32b8799ae9f/1606550368449/real_racing_3_hack_without_human_verification.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/jibubuviwufo.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_off0000c749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC749 5340 bytes
SHA-256: b051b20457de2e6eec7c32953a5ae25d100297d2a85437cd4a328b05fc172f71
font_01_sfnt_off0000d94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 10628 bytes
SHA-256: c7a4dfb6311bb5527c8e357393ca825f9773e59369aa675036a2b9ec47206fe4

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