Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1b7409670bd84c…

MALICIOUS

PDF

80.2 KB Created: 2021-04-02 21:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 875b0ae666128edd87e438f1f82fe70e SHA-1: 7c79508b9cbe76b149e7c39df76a123f4b0e8d07 SHA-256: df1b7409670bd84ced3b0b48e7dcca4bb76cb775fbe993af1758315769032974
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with several pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content, likely for credential harvesting or second-stage malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://xezojetit.ru/award?keyword=lighting+for+cinematography+pdf PDF link annotation
    • https://cdn.sqhk.co/wuwuvojik/Jhcvhfg/resume_templates_word_2007.pdfIn PDF document text
    • http://basvuruizleme.online/rulubiwepugakisediligx92ys.pdfIn PDF document text
    • http://whitetwo.space/54906962678pui5v.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/Vzhatij/phone_tracker_free_online_australian.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/the_lightning_thief_chapter_10_questions.pdfIn PDF document text
    • http://pizuwujigajanen.medianewsonline.com/4726657239.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/gcKidhg/32116254818.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/govemefetomodedetodiopenn.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/ievgiEZ/word_collect_answers_level_1708.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/dilivaram0v7lm.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/minn_kota_terrova_parts_schematic.pdfIn PDF document text
    • http://clientbluebadge.com/wapaxokuum4zi.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/end_of_open_range_barbed_wire.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/1ZHjgha/91238782037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://770603ce-cae8-48b7-b4e8-6e15b9dac1cd.filesusr.com/ugd/e975af_10a703d89ba4468495f3824452c84484.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_d490c365baed49c6b49cdc3dafed5c1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/45787300197.pdfIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_35c84f5dd549404e95b136adb5c9fea3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/finance_crossword_puzzles_with_answers.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_1993f55303b048ed8322bcc2cdab198d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pafexegud/81002420357.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/bed_bug_report_toronto.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/58002109661.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_2b4559c158f54382a098cf78e27de22e.pdf?index=trueIn 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_off0000fba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 5404 bytes
SHA-256: a4a460abd15e2a202ac97372fbac4969e7e38c82fe09ab6673cb49c0a5e55c1c
font_01_sfnt_off00010df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF3 10824 bytes
SHA-256: 7d1ab0fb4d5b15280304367a87f7ad9401eff8983dcdba1b746552a4c95947e3

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