Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f541d4e3f76c23…

MALICIOUS

PDF

61.8 KB Created: 2021-02-23 00:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a47b369221003c2f1445d8f2ee76611a SHA-1: 8013580179b5c4cfd6a2841a68d250476fe044dd SHA-256: 40f541d4e3f76c23beacdd0bcde2c9b91fe5246632f5709d847db28b9bcdb41a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=wheel+horse+d200+parts+manual PDF link annotation
    • https://cdn.sqhk.co/jokawefezo/RihhdDp/part_time_weekends_only_near_me.pdfIn PDF document text
    • https://moredotaze.weebly.com/uploads/1/3/0/7/130776260/dufepasozelane.pdfIn PDF document text
    • http://biggymstoe.com/61100608933kfepk.pdfIn PDF document text
    • https://nijolonarezop.weebly.com/uploads/1/3/3/9/133999518/70f08f5f07433.pdfIn PDF document text
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/lovuvofowef_jenagol.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/zobipe.pdfIn PDF document text
    • http://begemot.space/73768815001dzh7e.pdfIn PDF document text
    • http://antonioit.space/midasorirutovowusor9og98.pdfIn PDF document text
    • https://wurewoji.weebly.com/uploads/1/3/1/4/131438788/bf636a7d3a34e5.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/jcXgjpl/anti_aircraft_gun_ww2_facts.pdfIn PDF document text
    • https://cdn.sqhk.co/zudoputasafe/GSggZqv/buy_fold_up_table_legs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruwiluleter.epizy.com/what_four_factors_affect_rotational_kinetic_energy.pdfIn PDF document text
    • http://mudozegiviw.epizy.com/opera_web_browser_vpn.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/44077917165.pdfIn PDF document text
    • http://tewidunutazi.rf.gd/is_castle_in_the_sky_related_to_howls_moving_castle.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_off0000b43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43E 5488 bytes
SHA-256: d5751ed9c9b5598b75c845fba38f19691fbb7e973bf964678bfa7e09878d6d24
font_01_sfnt_off0000c6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C4 10392 bytes
SHA-256: b5a3764ca3b434a7b45041943801fcb2b9472668878f9b090fa3a2d78494223e