Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2d3e7be7ce1e34…

MALICIOUS

PDF

86.1 KB Created: 2021-01-16 14:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 78e80ed230e1a8f17fc06e2471aea508 SHA-1: b3a608b66af61a32cc3a8591374356bf7e276a0e SHA-256: 9f2d3e7be7ce1e340f92102784c2b6ee5a4fac31536f95d9920d1bd481d10a87
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected it as a phishing trojan. The document body is heavily obfuscated, but the presence of URLs and the heuristic firings strongly indicate a malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://cctraff.ru/aws?utm_term=shazam+para+pc+windows+7 In PDF document text
    • https://xoburorabusu.weebly.com/uploads/1/3/0/7/130738623/cb2dc7250d92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473656/normal_5fcc253aa7847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478947/normal_5fa850f97808a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_5fae86fe5c3c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_5fa494b17e2d0.pdfIn PDF document text
    • https://jexewibovagajuk.weebly.com/uploads/1/3/4/4/134485971/ravona-magisa-rezojari.pdfIn PDF document text
    • https://mifojarodileg.weebly.com/uploads/1/3/4/7/134707921/c01f6761b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476758/normal_5ff1ae4f1332b.pdfIn PDF document text
    • https://jijemelagif.weebly.com/uploads/1/3/4/0/134016961/2897874.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485568/normal_5ffc1d562d77c.pdfIn PDF document text
    • https://geregilewupune.weebly.com/uploads/1/3/4/8/134849809/3454392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5faf772dc72e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5fd5f04cdf084.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/ravuxudibure/akhenaten_egypt_city.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/24508267426.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_off00010fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA0 5604 bytes
SHA-256: d5808d7f5acb0471ae66568076509ede5e1cee6e9e12f4a1421836990d998f80
font_01_sfnt_off000122a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A2 12476 bytes
SHA-256: 500ff8557360f1e5301af00ce508a1254adc4c97a40f474723779072f08b150b

Open this report in the interactive analyzer, or submit your own file for analysis.