Malicious PDF — malware analysis report

Static analysis result for SHA-256 806055489f610490…

MALICIOUS

PDF

86.6 KB Created: 2021-03-19 00:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45f478a0ebe1f4f6a534e2fe2ee812bf SHA-1: b37f3acfb7d903182c34d57295eb59bedc36dcf3 SHA-256: 806055489f610490f4f50a6eed82a811a6cde55b72b03dcc95737cea1a6297f1
186 Risk Score

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 0.9991

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://midufefew.ru/strik?utm_term=walmart+black+friday+television+deals PDF link annotation
    • https://lezuzanufebaj.weebly.com/uploads/1/3/4/8/134873312/jelawuxe.pdfIn PDF document text
    • https://vuzupugum.weebly.com/uploads/1/3/1/4/131453250/1041171.pdfIn PDF document text
    • https://cdn.sqhk.co/zoraxiraga/ghyjcgi/sunomutotewuxifaju.pdfIn PDF document text
    • https://cdn.sqhk.co/badilapo/jeih6jh/eau_guidelines_haematuria.pdfIn PDF document text
    • http://wujumelugesebem.22web.org/zasegaxosanesarazuporede.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/6jepjd6/72376607448.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/hgjc4gc/queen_greatest_hits_2_album_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/Khf4f1c/bexopuzekegonodag.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/fixojejowetotapo.pdfIn PDF document text
    • https://resivoviwogo.weebly.com/uploads/1/3/3/9/133987135/21416a99df.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/mevidem.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/94210489414.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_c16aa75114e94b8eac813c34aef0054d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/97645064221.pdfIn PDF document text
    • http://rupawuvafe.rf.gd/nedabisanuk.pdfIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_9ba1c33e8efd4bc395bf5aa83a9f30a8.pdf?index=trueIn PDF document text
    • http://gusagokasu.epizy.com/gigezozati.pdfIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_092e85ef22d54055b8275436525f61cf.pdf?index=trueIn PDF document text
    • http://pubupamosala.epizy.com/plastic_deformation_ppt_slideshare.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_2bd562531e0f4ae38e33ffd19ef3bffa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dobesogum/how_to_install_a_threaded_pipe_union.pdfIn PDF document text
    • http://muviwozusisewer.rf.gd/dewalt_extreme_100_piece_mixed_drill_bit_set.pdfIn PDF document text
    • https://03234a85-d811-4a68-a1f9-f7315bf9ccb2.filesusr.com/ugd/079591_cd52a827e614429cbd5edc1b218fefcc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dagasopones/xufokobimilapop.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_off00011304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11304 5548 bytes
SHA-256: 92e7c72662578c28ba651d3424ea2ebeb7e18a1f5628cf0509aedbbd7f4a7649
font_01_sfnt_off000125e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E3 11332 bytes
SHA-256: ffc2115d22cc64da5fd15f4d28f8b78c26d192688425ce3611e988907dbc8d68