Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e09f73ec18aaa36…

MALICIOUS

PDF

91.5 KB Created: 2021-05-07 18:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 92f58ceaf56a73dac801827ca5422ea7 SHA-1: 28c5b9eb860b69a80cb9d7b98f55588ba401336f SHA-256: 0e09f73ec18aaa3604456c5eccc7e2ef3c90dfedbad4d0da7463f98fe525d699
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are on disposable domains, indicating a link farm or SEO poisoning attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs and the structure of the PDF point towards an attempt to redirect users to malicious 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
  • 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.
  • 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://xezojetit.ru/strik?utm_term=walmart+inventory+checker+ps5+digital PDF link annotation
    • http://fosireditoj.mygamesonline.org/how_to_care_for_gerbera_daisy_plants.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_602cf385e4b40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_600ea67f853d3.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/ashampoo_burning_studio_19_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_604d17c994aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480579/normal_60485083e0869.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/banquet_server_job_description.pdfIn PDF document text
    • http://natbeach.space/4401175493hw3ix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476147/normal_602d956ecb42a.pdfIn PDF document text
    • http://love-your-lips.online/consumer_reports_hepa_air_purifierkppp5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_602537718f3c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5feec83240ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_6068c9ca0544c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484990/normal_5fec8a4bbec4f.pdfIn PDF document text
    • https://karinavoru.weebly.com/uploads/1/3/4/0/134017817/f220f.pdfIn PDF document text
    • https://pigasuranebuja.weebly.com/uploads/1/3/4/4/134459694/1109638.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bepafazo.epizy.com/gezekof.pdfIn PDF document text
    • http://lupemuvuxetamok.epizy.com/comic_book_storyboard_template.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_off000121d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D7 5852 bytes
SHA-256: 72e3f7215e79f9e2b278617d34a3a004ac92621e9e8fd013882fbf62727014b1
font_01_sfnt_off000135ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AD 12268 bytes
SHA-256: b1b7897645e9619e4d938eb2b3913f0028cd3c4bd2a8bdc20883613dee1fe0f8

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