Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bf290ab88672ee…

MALICIOUS

PDF

77.9 KB Created: 2021-04-05 00:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 58520a2032f6c49f3d68a57015e5450e SHA-1: 586e08af7b1ee1bf4d8c406928a1312f9d33d67d SHA-256: a9bf290ab88672ee5d410aa91615534fcdce836516bd18fc77863eb22c106520
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/strik?utm_term=what+is+the+biggest+pellet+stove PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368758/normal_6067bcc81f334.pdfIn PDF document text
    • http://instapodarok.site/832171553793fx7n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_604bb5bcb1190.pdfIn PDF document text
    • http://hidver.com/92113563890tq5wy.pdfIn PDF document text
    • http://nowefatot.22web.org/demutagunikizuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482858/normal_604b521f1c425.pdfIn PDF document text
    • http://osmosiotzs.fun/34443691399w5s9z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_6064f307e788a.pdfIn PDF document text
    • http://5-euro.info/who_sells_greenworks_productsod8x2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_f21079aecce9419ba0c6d8ffdb8f67a0.pdf?index=trueIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_efb45a75cdd6446eb982efcc8d00669c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/afcb48b0-5196-4b26-871c-56b0387d32b1/gravity_falls_journal_1_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f53afeb-22fb-4ed2-ad1d-1d2a1856fd71/potokuvajox.pdfIn PDF document text
    • http://sefegotanekexe.rf.gd/24043390090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df4727a-80a4-4bf4-b25f-85b4808b110c/60287999835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/270f3f39-40ce-4248-a3a2-71443894721f/gazorosabixuruxelimitagu.pdfIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_605ad2412b4842f6ad9e49c03b0229e6.pdf?index=trueIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_f0ab952e2bcf41f7ac9eaa48f41c3edb.pdf?index=trueIn PDF document text
    • http://jumebesatupa.epizy.com/capoeira_fighting_techniques.pdfIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_7a569ec6f58b4fc392668e51c6223511.pdf?index=trueIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_08e36d54f617414594967346bfafa649.pdf?index=trueIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_b9731f9926a04f278b9de892b8e52afd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92820aa2-f908-468b-98d6-8d9bf2e97724/englander_pellet_stove_control_board_factory_settings.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_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 5200 bytes
SHA-256: f72f652995c3103e32fa2e017fc2a1e525e78403a111261c3978a7877d7735e2
font_01_sfnt_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 10968 bytes
SHA-256: 070b5f2341caaa6b31e83674dabcc633ff5901ffec61a802a927ec398a3a0c73

Open this report in the interactive analyzer, or submit your own file for analysis.