Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e50aea6cb8fad16…

MALICIOUS

PDF

74.9 KB Created: 2021-01-23 01:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 66e97bec667b312acc5cb27199ab5047 SHA-1: 26f40679eea8e2b9a38fa1fc609c67f8907d96dd SHA-256: 2e50aea6cb8fad16b384b14e247a88a564d8c16a6e1529e195e53ad0ffc992bc
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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/aws?utm_term=autocad+civil+3d+2018+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/jogekiluse/oe0hi4Z/3d_super_bike_racing_games_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/iNIOhbd/jaman.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/VRlzdW2/piwigad.pdfIn PDF document text
    • https://cdn.sqhk.co/retuwami/hjpIimH/12788487309.pdfIn PDF document text
    • https://cdn.sqhk.co/vibesadebo/M3iaig0/sikakezubukuvisowopadibu.pdfIn PDF document text
    • https://nabezaxe.weebly.com/uploads/1/3/4/8/134852032/7313188.pdfIn PDF document text
    • https://jutokikifugata.weebly.com/uploads/1/3/1/0/131070124/0e430c.pdfIn PDF document text
    • https://cdn.sqhk.co/nesixepo/ibCjh9u/xisuretujevagivupi.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/hh1hijf/27414582643.pdfIn PDF document text
    • https://welajewovire.weebly.com/uploads/1/3/3/9/133999455/4190f4dc94.pdfIn PDF document text
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/098828d7.pdfIn PDF document text
    • https://nimimetifav.weebly.com/uploads/1/3/2/8/132814674/xadosa.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/c4c6ef130.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/1222877.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://wufizomofoduzin.rf.gd/vasajomiwivena.pdfIn PDF document text
    • http://laxaguwen.epizy.com/57223130937.pdfIn PDF document text
    • http://ratudafoxivux.rf.gd/adobe_creator_free.pdfIn PDF document text
    • http://vuripoda.epizy.com/wondershare_filmora_8_free_with_crack.pdfIn PDF document text
    • http://vefagukolile.epizy.com/parudivumime.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_off0000da6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6D 5524 bytes
SHA-256: 74182db79a14cf7ec24f68bce10dedd4725910bfc613744be06b4133c9d328a8
font_01_sfnt_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 10176 bytes
SHA-256: 8a624c07c56d14e123564620565c7ce39c851c61a310b48f7eec06bde7fd92ee
font_02_sfnt_off00011003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11003 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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