Malicious PDF — malware analysis report

Static analysis result for SHA-256 52fa4629ba23f8b4…

MALICIOUS

PDF

69.9 KB Created: 2021-04-07 14:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56686db8ef86a0a94e9a2ac740c4fe4a SHA-1: 599f81dc026bba6dcaf8351b7e0f1e5e004dc8c7 SHA-256: 52fa4629ba23f8b479670b5ed26247e4d5dd668bfd8344db80d290471e9aed27
146 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. It uses a callback-phone (TOAD) lure. 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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://zajinet.ru/123?utm_term=consumers+report+phone+number PDF link annotation
    • http://shoop-fo.ru/27407027619o5z7d.pdfIn PDF document text
    • http://gimemuwet.mypressonline.com/track_and_field_rules_and_regulations.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/ehfpigJ/free_apache_helicopter_simulator_games.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/muguzemolobare-bibaz-vesub-ruvaxurut.pdfIn PDF document text
    • https://leliwigozamik.weebly.com/uploads/1/3/0/7/130738568/nujututum-mefelo-gevado.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/cvThihe/gravity_rider_zero_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/ghghyUr/xibavarelab.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/42785350624.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/dYujfjj/kupuzomazuber.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/jjy1pjd/jikenekakif.pdfIn PDF document text
    • http://com-copyrighit.com/biological_diversity_meaning_in_englishpq4in.pdfIn PDF document text
    • http://kogowetek.getenjoyment.net/state_trait_anxiety_inventory_test.pdfIn PDF document text
    • http://artdebug.site/formalit_bnficiaire_effectif_tarifs0y2n.pdfIn PDF document text
    • http://idealslim-ordina.site/44346010808upj0k.pdfIn PDF document text
    • http://ig-copyrightnotice.com/menezurawefwq4wg.pdfIn PDF document text
    • https://deserekinubolid.weebly.com/uploads/1/3/4/3/134319780/gaxixofofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_aa5648204a614d25928791e4b8e52b24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rowubunak/battleships_template_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/o_cavaleiro_das_trevas_ressurge.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_ba2ac25414e046188c10c723bf4895a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/philips_air_fryer_owner_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/nine_stars_touchless_trash_can_replacement_lid.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_off0000d78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78A 4860 bytes
SHA-256: c75057a6cb61ff0b908bddd9c073a37b6eb9d598230cdd12eb41df54ab8f6166
font_01_sfnt_off0000e7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 10116 bytes
SHA-256: f62b9ce62665b9482d680d17444d7a9bf6990def225b93a7a2dd8c3140ae73f7

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