Malicious PDF — malware analysis report

Static analysis result for SHA-256 5178a3a234eee38c…

MALICIOUS

PDF

83.4 KB Created: 2021-03-15 20:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8313df736476a195a244f03d6ab6eac8 SHA-1: 52ee45c940e63f77b5e3e16b343c8602e2313c3c SHA-256: 5178a3a234eee38c53534c2569d54f1581397a63695ee36f7e9edce57f925d94
126 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 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=hosanna+marcos+barrientos+letra+y+acordes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417675/normal_604ef22d28177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_601bff671b3dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_6013f3515e3a2.pdfIn PDF document text
    • http://lisolu.org/davavojamakomukizotinepu73fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501961/normal_60467336256c8.pdfIn PDF document text
    • http://ig-socialmedia.xyz/4x4_rubiks_cube_pll_parity_algorithmsm2qri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_601e883ae607f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376858/normal_6005c92191600.pdfIn PDF document text
    • http://dompodklyuch.com/37392650159tyh0b.pdfIn PDF document text
    • http://limuzinof.ru/juluwr5z3c.pdfIn PDF document text
    • http://blockhcain.host/lifetime_44-inch_polycarbonate_portable_basketball_hoopw2rmt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_602c41b80072a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_604b26b77e92a.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://xumizaxojumiko.epizy.com/70834539292.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/tasebowimaxeboxe.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/gps_garmin_nuvi_2589lmt.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/dafimidanitulefalafi.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/repokefozez.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/xifolipano.pdfIn PDF document text
    • http://xoponupesede.epizy.com/foil_foam_insulation_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/langrisser_mobile_soldier_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/lines_of_symmetry_worksheets_for_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/how_to_clean_a_whirlpool_hot_tub.pdfIn PDF document text
    • http://vominobig.rf.gd/2587977220.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/98038119009.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_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 5076 bytes
SHA-256: e503c9e3f99b1e8a4e2b694e1b02281f81bb4b8fb23aa4376f1247f0b77dba8f
font_01_sfnt_off000105c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C4 13136 bytes
SHA-256: c1aa13bdb4ad2aca8238176f5a4a21d07cdb2a2b7e0f169f9830725fc37bc91d
font_02_sfnt_off00012fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378