Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c065056fbc394c…

MALICIOUS

PDF

99.9 KB Created: 2021-01-26 16:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f8d3438b5d1beae4ddbde66625d42e38 SHA-1: 2669040e006026109c4e3fd5c27c9e41e6a75f5d SHA-256: 01c065056fbc394cbfdf0850e1e6aefb9085ea1aa7d0c8ba6f05b5989d9d1f50
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the nature of the link farm suggest an attempt to lure users to malicious content or manipulate search engine rankings.

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://trafftec.ru/123?utm_term=holy+symbol+5e+cost PDF link annotation
    • https://cdn.sqhk.co/losegiro/RO0hiyl/84463003114.pdfIn PDF document text
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/a9337ee7.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/1Pjhm2t/rirarer.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/98549c24000211.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/kbihuWJ/ice_cream_song_triple_j.pdfIn PDF document text
    • https://cdn.sqhk.co/nakusunegud/gjijnie/carnivores_dinosaur_hunter_hd_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/gg0oyJJ/automower_connect_app_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/netesatova/R5CLpGA/best_air_war_games_pc.pdfIn PDF document text
    • http://sofebitaxed.iblogger.org/mp4moviez_bengali_movie_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497658/normal_5fe80a37eefbf.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzewekafan/digCqji/lovomokitevafojasa.pdfIn PDF document text
    • http://donuliwobem.iblogger.org/depression_questionnaire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mokixetat/56343538180.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/greenworks_40v_chainsaw_manual.pdfIn PDF document text
    • http://tolamepaduxeju.rf.gd/skepticism_philosophy.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/chogada_tara_hd_video_song_1080p.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13877 4964 bytes
SHA-256: 7ab784c9d97180faf64483b5356212cad5d44c635a06d7da8d94678574f64f80
font_01_sfnt_off0001495e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495E 10528 bytes
SHA-256: b4a5a778de220d3974a2b5a2d6392d85ac6b7d330eec0ee3f155fa19afb9a1b9
font_02_sfnt_off00016d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D78 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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