Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd61105f8a45a451…

MALICIOUS

PDF

71.3 KB Created: 2020-11-20 09:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2ef7c496eb0ad20e85a3382f92bb1e04 SHA-1: d4131c345dc35220a3c26f0831ba03af82474c05 SHA-256: bd61105f8a45a451fc0fd620b01eaa61da873c025b102451f94dd886ea2bf3e8
186 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 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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?utm_term=free+download+the+serotonin+power+diet PDF link annotation
    • https://dozemobogojegum.weebly.com/uploads/1/3/4/7/134759036/vujemeveja-gogof-suduvufiwetemux-sopipo.pdfIn PDF document text
    • https://fisolaxarod.weebly.com/uploads/1/3/4/4/134471724/89dfa55e85a6c62.pdfIn PDF document text
    • https://zitofizifejiza.weebly.com/uploads/1/3/4/7/134706741/dikisajubedeni.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/zejudubozoponabo.pdfIn PDF document text
    • https://nubarosu.weebly.com/uploads/1/3/4/7/134726157/zulubagupix.pdfIn PDF document text
    • https://kedixezowudogaj.weebly.com/uploads/1/3/4/6/134618790/zijetagelaxujat-mujefusefoped-bilexekuzuf.pdfIn PDF document text
    • https://batatifenosi.weebly.com/uploads/1/3/4/5/134513642/38f1fd3677.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/jojowafevuj.pdfIn PDF document text
    • https://pamarilu.weebly.com/uploads/1/3/4/3/134322341/tekodomenolabuxogoz.pdfIn PDF document text
    • https://zopavuro.weebly.com/uploads/1/3/4/5/134584556/9012393.pdfIn PDF document text
    • https://rutijafajiwep.weebly.com/uploads/1/3/4/5/134592903/remoxinif_xiterojisek.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/1174021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/00d6488f-c61f-42a2-a103-fd9d38bca366/luxamububilububigob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8dce596-0fba-4072-9750-1ef36c6f1a8b/70_weeks_of_daniel.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/zefovawevevedunoguvufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b656bd2-5f91-4e55-bf6d-527cad2bf25f/patologia_robbins_10_edicion.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/fiziriropuvoximi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFF 4884 bytes
SHA-256: ab9778c2f46adacc5f926bb7ad3bb6940c6536c047ea8b001a304d5d8157e5f6
font_01_sfnt_off0000dd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD97 10616 bytes
SHA-256: d66dfc4bbb5ca35a229ce2f914ecf0a07f2c963586d2018fbe202393c056f688
font_02_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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