Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a808db3852a2d0…

MALICIOUS

PDF

79.6 KB Created: 2021-03-02 11:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ed45229795da80cccf43a5b383fb250d SHA-1: f08f52f3520830c4f1c86bd81d33c59008f17e44 SHA-256: d7a808db3852a2d018d7e921c489cef823b045ed38ec8182a80a5a6a4dd9cbfa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed as a link farm, hosting numerous external URLs, with one specifically identified as a potential phishing lure. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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://dafemum.ru/strik?utm_term=logitech+mk320+wireless+keyboard+with+mouse+combo+%2528black%2529 PDF link annotation
    • https://cdn.sqhk.co/napumefu/hgxnjj8/97070953255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_6026c7cb7e38e.pdfIn PDF document text
    • http://talemine.getenjoyment.net/jc_penney_sewing_machine_model_7057.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/is_the_esv_or_nasb_better.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5fe2989d4d918.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/stamina_body_trac_glider_rowing_machine_1052_vs_1050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_5fe66c64dc91d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463298/normal_600322c372f17.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/pusokobamiwidezitulev.pdfIn PDF document text
    • http://fuwakesesul.22web.org/niwudexiwikiwaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/higCpgc/huawei_launcher_apk_2018.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/black_ice_key_and_peele_transcript.pdfIn PDF document text
    • http://debagigitefofo.iblogger.org/3390553426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japamitafixe.myartsonline.com/yamaha_mg16xu_driver.pdfIn PDF document text
    • http://numowun.rf.gd/leif_nelson_size_guide.pdfIn PDF document text
    • http://manosotidokef.myartsonline.com/38010856090.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/how_much_is_pa_gas_tax_per_gallon.pdfIn PDF document text
    • http://xijixabomama.rf.gd/80791317430.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/arduino_nano_v3_datasheet.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/wicked_book_review.pdfIn PDF document text
    • http://jasigobup.epizy.com/91276849301.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_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 6284 bytes
SHA-256: cc9e5b1580c196e1b6661ee686f5143f59b9798ba1ac044c7130d61d1a201eed
font_01_sfnt_off00010812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10812 11376 bytes
SHA-256: accbdb7e87d930f580f4dd58595fe90730242060eabe1a973efd36a8ea4d2d4b

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