Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8e005e28e9dbc1…

MALICIOUS

PDF

79.5 KB Created: 2021-02-21 04:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1fc523d32d9e012adc178a4e96935643 SHA-1: b007d275886f31a3384149099fe10ae0cc3618ab SHA-256: 9a8e005e28e9dbc1c1daa4706e9ac613d37b2fff1367ad51f238f7efd851dbd9
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and extensive URI usage are indicative of a phishing or SEO spam campaign.

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://druttle.ru/wix?keyword=japan+climate+today PDF link annotation
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/sidirip_defikewulezi_tiligidume.pdfIn PDF document text
    • https://fetavagipiw.weebly.com/uploads/1/3/1/3/131380759/c0dafcdc7.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/gPts6je/monovepevagepapotowikowo.pdfIn PDF document text
    • https://rixevabibevata.weebly.com/uploads/1/3/2/7/132710753/b4e1a30eb8ebab.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/9115652.pdfIn PDF document text
    • https://wiwojuzikog.weebly.com/uploads/1/3/6/0/136050554/5434480.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/iiyhgwa/87606290142.pdfIn PDF document text
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/tepijerek_puladabiz_rogatositidez_rivukupufi.pdfIn PDF document text
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/12ebc0dd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5fe72cdc7165c.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/rhbgfZ6/sell_amazon_gift_card_to_bitcoin.pdfIn PDF document text
    • https://wodaxudufusan.weebly.com/uploads/1/3/0/8/130814186/ganapikowexe.pdfIn PDF document text
    • https://cdn.sqhk.co/waderapal/Xjfxlhi/pokerstars_play_free_texas_holdem_poker_game.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
    • http://mogadaf.epizy.com/rust_key_cards_guide.pdfIn PDF document text
    • http://wigebinijeg.epizy.com/how_to_get_old_sports_illustrated_magazines.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_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 4824 bytes
SHA-256: f15a622999ffff83b776301ca6889e9f897fc86580073369b92b35deaa56455d
font_01_sfnt_off0000ff09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 10428 bytes
SHA-256: d59aa08d897047e43b0e8f4ab8ec68d3e51b1f5d6cdbdabd451f2d629956da51
font_02_sfnt_off000122b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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