Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d81a29f726ac75d…

MALICIOUS

PDF

75.5 KB Created: 2021-02-27 23:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b3ec11000fa246f2855dfbed43a54532 SHA-1: bef9e0416d98c87e484af5457f9f2c02f1447b62 SHA-256: 6d81a29f726ac75da960299df8b71167f54656c1981367473233213e329ec4ea
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous external links, with one specifically pointing to a URL that appears to be a search result for a food processor, likely a lure. The presence of multiple disposable hosting domains and link farms further supports a malicious intent to obscure the true destination.

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 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://gimoguvi.ru/award?keyword=cuisinart+pro+classic+7+cup+food+processor PDF link annotation
    • http://famozosivupiwij.sportsontheweb.net/how_to_get_share_the_wealth_cards_in_life.pdfIn PDF document text
    • http://mefazezotaw.22web.org/pibexuronisifopo.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/how_to_ignite_majestic_gas_fireplace.pdfIn PDF document text
    • https://jokiwuruxuwam.weebly.com/uploads/1/3/1/4/131437523/3805972.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/5299826.pdfIn PDF document text
    • http://kubarabonexomi.iblogger.org/veronica_netflix_parents_guide.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/what_documents_should_be_declared_as_records.pdfIn PDF document text
    • https://wowujisalot.weebly.com/uploads/1/3/4/3/134349860/nokebumonimag-wunisuma.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/pufixozatopulat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pubometev.rf.gd/97429023533.pdfIn PDF document text
    • http://zowiseli.epizy.com/adobe_acrobat_dc_reader.pdfIn PDF document text
    • http://buvumitibeve.rf.gd/ipcc_special_report_on_cryosphere.pdfIn PDF document text
    • http://manosotidokef.myartsonline.com/zupezabuwawadufe.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_off0000eaf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 5136 bytes
SHA-256: d731bb6df99a7ecbf512f8f4f68649e48e1361291a0341df80d2eacb0d039b61
font_01_sfnt_off0000fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 10596 bytes
SHA-256: 7bb40e671ac731d9aa04ab72767e8ed7389c08624ced9d39a31ac6a34d1ac77b

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