Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb080ca0b6e18bbf…

MALICIOUS

PDF

87.2 KB Created: 2021-02-18 06:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 62a3d02ffb2822130b55d9278c8ee775 SHA-1: e3b238301cc563e9efb63eb8f2a8ddeaf1e917dd SHA-256: fb080ca0b6e18bbf075221fe82f22f2a922356fdc5b7f4491aadd8eabfe7f885
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection to malicious sites. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the phishing lure attack pattern.

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://druttle.ru/wix?keyword=shell+rotella+15w40 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366302/normal_5fe11b3ea4e3e.pdfIn PDF document text
    • http://edayafar.xyz/janabo3gwwo.pdfIn PDF document text
    • http://murerejomijuv.22web.org/20986946488.pdfIn PDF document text
    • http://topshops.website/xafevetaxavasepinokophooqi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_601c75be3c1e4.pdfIn PDF document text
    • http://sentytld.online/mebefaxuxebukemagax8bw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383156/normal_602dd5aec37db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470408/normal_5fcda4e914d5a.pdfIn PDF document text
    • http://kasyanbeauty.com/student_name_card_templatec2spk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5fdc3fd93af34.pdfIn PDF document text
    • http://front-glass.space/alberto_moravia_agostino1ox16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416796/normal_600a40aabca51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426549/normal_5ff98ae5d5a26.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/bofagi-muriju.pdfIn PDF document text
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/04eeadccf58f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_60279668f3bfc.pdfIn PDF document text
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/8497532488.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zifiwezuxibis.rf.gd/buvesasoxavisudigo.pdfIn PDF document text
    • http://puvusevakap.epizy.com/adobe_audio_editor_software_free.pdfIn PDF document text
    • http://fotiworoz.epizy.com/betoremudutivuv.pdfIn PDF document text
    • http://sawutekoxa.epizy.com/misosibifefe.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_off000112aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AA 5196 bytes
SHA-256: fa290867f6577e1fd8a7f667504e722c113e964a8b39b75d285a6ffc14d5054e
font_01_sfnt_off0001246a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246A 12936 bytes
SHA-256: baf4a7ef0b12e557cc08e007120c993c84c20e2aff093b1b31ed47985780e9f4

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