Malicious PDF — malware analysis report

Static analysis result for SHA-256 41def171c6cd8464…

MALICIOUS

PDF

69.8 KB Created: 2021-02-16 09:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5d6704e7f12852c75c4f110befbc356c SHA-1: e57cac3b69e5d49c99f5c7780c08c20bdea845af SHA-256: 41def171c6cd84646e46da42678a3dc57eaa4da848500fc1d2448b3eaa88f98e
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=gallery+apk+download+free In PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/gavasemubu_gogofom_kuduv_tenubonitu.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/2Qiflhd/star_wars_movies_timeline_sequence.pdfIn PDF document text
    • http://olymptrade.buzz/mt_laurel_nj_police_reportsuut88.pdfIn PDF document text
    • https://zefemebok.weebly.com/uploads/1/3/0/7/130775969/wurugazawe.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/igfhbqa/ryobi_pressure_washer_wand_home_depot.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/iLigVFl/todipazo.pdfIn PDF document text
    • http://my-favshope.online/805172629814fika.pdfIn PDF document text
    • https://niresofet.weebly.com/uploads/1/3/2/6/132682193/rakori-rirejanejusiger.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jgyjcgg/flights_to_vegas_from_chicago.pdfIn PDF document text
    • http://olymp-trade.top/36177890687g4k7n.pdfIn PDF document text
    • https://cdn.sqhk.co/gevolonovare/biiLDhj/2433928119.pdfIn PDF document text
    • http://contact-git.top/azitromicina_900_bula2iy44.pdfIn PDF document text
    • http://websporizle3.com/god_only_knows_vocal_sheet_musicnt6mf.pdfIn PDF document text
    • http://gta-msk.ru/fituwoxogupenewurijuiuksn.pdfIn PDF document text
    • http://dorightunion.com/survivor_island_game_for_call_centerqrpc6.pdfIn PDF document text
    • http://sovetnik53.ru/play_tube_for_cats987dv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gimusatis.rf.gd/cheerleader_uniforms_for_youth.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/43145849147.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_off0000d564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD564 5144 bytes
SHA-256: ae585578c1b55f036eb20d3d4ec23b3c492a2172497d7acd5c0f4cc99591832a
font_01_sfnt_off0000e71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71A 10208 bytes
SHA-256: 85204361d356f8f3d60d9d6bb2b31583136c803bdc4f17967104b4ed43f098a7

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