Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d95bdec2d8df87…

MALICIOUS

PDF

98.5 KB Created: 2021-04-02 18:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2b07bcff4aadd2fc28ccbbebb6268296 SHA-1: ddd4b8c968d7594e8ac90f74df85cc2524e000f5 SHA-256: a5d95bdec2d8df87b213853487b2807946757e5b4ca6baf4c8ee41b49620b72d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farm characteristics further supports this assessment, pointing towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/strik?utm_term=plantronics+voyager+5200+uc+review PDF link annotation
    • http://zofunubesosena.mypressonline.com/fepeteraverovedenenux.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/j6viegf/sonisovas.pdfIn PDF document text
    • http://rotukefune.getenjoyment.net/addressing_modes_types.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/5ad4493.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/list_of_assets_liabilities_and_equity.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_602161ba61a6c.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/BiaKohj/ultimate_lion_simulator_2_free_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/Wjdrgcs/riwenagoxukukonutaw.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/imgeUja/lotupelalibisagurera.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/how_to_count_calories_eating_out.pdfIn PDF document text
    • https://momimuraw.weebly.com/uploads/1/3/1/3/131384495/7011231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486751/normal_605c5e7567e0c.pdfIn PDF document text
    • https://bunuterujizid.weebly.com/uploads/1/3/4/8/134882333/vigebofivugegi.pdfIn PDF document text
    • https://mogazikazalag.weebly.com/uploads/1/3/4/4/134440800/c4e2aa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417029/normal_5fc933601a074.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/QiihYPA/netflix_party_on_samsung_tv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pilixizetexupaf.epizy.com/772905593.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/scooter_flat_tire_repair_near_me.pdfIn PDF document text
    • http://tagedimevoxi.rf.gd/how_to_use_multimeter_dt9205a.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/small_mickey_mouse_ears_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/cpn_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/52104148043.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/47681603192.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_off00013204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13204 5620 bytes
SHA-256: b3534ae3ed0c43c3ea0ac26196a26eab54c48f455b4ae5c5e51289dfd068dfe7
font_01_sfnt_off0001455a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455A 23452 bytes
SHA-256: 047585c3ae2c15428733f961d73cc0fe8d5066d325752a46a8c3ebaa9c5283d0

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