Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f43b2c09493e4e…

MALICIOUS

PDF

100.4 KB Created: 2021-04-22 18:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38e6fac0f8eb8c4d45040f205100fb22 SHA-1: 7210112a44be8c1126af2caf66d01e23fe667cd2 SHA-256: f2f43b2c09493e4e99fed79e2eae57a99124359018696a7478dbe59a07251c22
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 0.9989

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://soxebez.ru/strik?utm_term=walmart+ps5+release+twitter PDF link annotation
    • https://limumowitizuwag.weebly.com/uploads/1/3/4/5/134587832/3717475.pdfIn PDF document text
    • http://vijulofa.22web.org/broiler_and_layer_management.pdfIn PDF document text
    • https://cdn.sqhk.co/nubevitawil/hzeic2T/69272310158.pdfIn PDF document text
    • http://leomannapov.com/cross_aldol_condensationb6bic.pdfIn PDF document text
    • http://umdtheatre.ru/62877103976uo6lr.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/chhidtL/18801979104.pdfIn PDF document text
    • http://wefinexof.iblogger.org/xonenurojotowinatu.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/MKgf7fH/rabbit_in_the_moon_japanese_story.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/qiagfif/bicycle_racing_track.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/gjFS6lk/volanukakixo.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/jahcjgD/lemotiba.pdfIn PDF document text
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/zejex.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/eicmAjg/rebalenu.pdfIn PDF document text
    • https://cdn.sqhk.co/nakolore/jjjcv4Z/gufemezevapowe.pdfIn PDF document text
    • https://lazezareb.weebly.com/uploads/1/3/4/3/134311903/5966575.pdfIn PDF document text
    • http://xusojuvexo.22web.org/99330403587.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/botiweturen_zujuwunor_zijovimaf_dalosog.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/iehiihE/bosorezuxixifesarigeluna.pdfIn PDF document text
    • http://zolomakowifop.iblogger.org/30588835315.pdfIn PDF document text
    • https://cdn.sqhk.co/fogizotufijo/p1KWnez/jequie_urgente_reporter_tatu.pdfIn PDF document text
    • http://healthit.space/21036167732hnucu.pdfIn PDF document text
    • http://kukushpa.fun/working_iptv_stalker_mac_addresscocwi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E8 5196 bytes
SHA-256: a0c9030543f1acac9d12cd859799a01cc1d1ac1e4a6626b81e12084ba062f985
font_01_sfnt_off00012b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B89 7364 bytes
SHA-256: b3e70eb48956ec0843edf1d6387a63d9c8976e2d22fb83fa59f085eab6d38727
font_02_sfnt_off00014555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14555 11804 bytes
SHA-256: fa132894de0d618d36eb807485bdd00c2dfbbe77cda7cb9db275ab7f421b074e
font_03_sfnt_off00016dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DD1 16324 bytes
SHA-256: 0cc5cd463905e7ac98888911a5f73249ead295a7e5eb112f1f0e854372cd59fe