Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9e9d1ce7b5b558…

MALICIOUS

PDF

78.2 KB Created: 2021-03-18 12:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f8cb55d4f7d6b7caa8b9527714a6453b SHA-1: 01ad9aa893a7b79bc56f36bdb51b93b6679eec8b SHA-256: aa9e9d1ce7b5b55851d1f890798f761693e6dae91b0b7bb56fbd40dba5698a65
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a link farm detection and a high ML score. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The ClamAV detection further confirms its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://resalured.ru/aws?utm_term=terrova+i+pilot+link+manual PDF link annotation
    • https://pujapuvefebawu.weebly.com/uploads/1/3/4/5/134581836/1d6163819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_601e42bfafb9e.pdfIn PDF document text
    • http://milansit.space/no_fear_shakespeare_macbeth_act_1_sc_5vr3w3.pdfIn PDF document text
    • https://kiwepuzimogavuf.weebly.com/uploads/1/3/0/7/130776877/kubovipiro-gapaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390996/normal_5ffdb9e49e2d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_601df7b3a6e4e.pdfIn PDF document text
    • https://lulapusorifat.weebly.com/uploads/1/3/1/4/131436971/c99e8.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/1567620.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/vesevudirim.pdfIn PDF document text
    • https://vidanametok.weebly.com/uploads/1/3/4/3/134318125/vekivadojelu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_60004983415da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380545/normal_60039f9d120ba.pdfIn PDF document text
    • http://sdfafq.info/wurigujenukopu1bthz.pdfIn PDF document text
    • https://nasesugafod.weebly.com/uploads/1/3/5/3/135387958/9b66d191fbb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492900/normal_6023f869d7041.pdfIn PDF document text
    • https://suzagadagaxu.weebly.com/uploads/1/3/0/7/130775939/2d027d.pdfIn PDF document text
    • https://lagubezawepafu.weebly.com/uploads/1/3/1/8/131856446/tirarulizugujasel.pdfIn PDF document text
    • http://mon-fortuneo.best/design_research_in_architecture_murray_fraser0kuv5.pdfIn PDF document text
    • http://maturibcgj.space/54717097847310co.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/615831de-3c3b-4532-9f43-753c0fde224f/25082480667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acdf6aa3-4b52-4857-8643-d1cc0de8e35e/ritew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd79c59-3bde-45c0-8ac1-fb9ec12a552f/bulizazikafegimaz.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_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 4860 bytes
SHA-256: 1e6ab5d251668054e0796d4481f5988617fe4ed6d5ed06e9f25c79401252160d
font_01_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 10348 bytes
SHA-256: 11f62c659e93680d819f949d24fde793ed09e4bb466d4104191ced548dd1dca5

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