Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f2df77f1ad0c38…

MALICIOUS

PDF

74.6 KB Created: 2021-03-14 19:26:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df6a6d99b97c401d713763a70d9160fa SHA-1: 15c79dd2e376efe16eba53b7d8ee24e3a9557651 SHA-256: f8f2df77f1ad0c388dedeee7bd734b1f0dddd3b9461da33df389e7edd36b9941
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=quality+management+system+manual+sample
    • http://wegansit.space/healthy_eating_meal_planner_templateq1ckq.pdf
    • https://tabekemaw.weebly.com/uploads/1/3/0/8/130874329/5081006.pdf
    • http://remontnatali.ru/julia_serano_whipping_girl0zspc.pdf
    • https://xelewutoritawi.weebly.com/uploads/1/3/1/0/131070131/mutum_jegolu.pdf
    • http://phrensy.co/jegasea7rh7.pdf
    • https://folugaso.weebly.com/uploads/1/3/4/5/134503816/fomanede_kosisobatuzamij_duvagaf_muxobilobu.pdf
    • https://vojufutevale.weebly.com/uploads/1/3/4/5/134521456/pabakuxono.pdf
    • http://devgame.design/fototaledomepopunepuga6sonu.pdf
    • https://livekurot.weebly.com/uploads/1/3/4/4/134443702/9572306.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nuselufuzo/free_customer_journey_map_powerpoint_template.pdf
    • http://wupaxine.epizy.com/birej.pdf
    • https://s3.amazonaws.com/sulasatevirexo/22059688378.pdf
    • https://uploads.strikinglycdn.com/files/ec2d3669-c42a-48fa-b70f-5c46b89aeab7/kenmore_90_series_washing_machine_parts_diagram.pdf
    • https://s3.amazonaws.com/kewakuko/nugoxujukabomenalazosib.pdf
    • https://uploads.strikinglycdn.com/files/d49c3a04-d13f-431b-9087-2dd2b92c830e/6668199030.pdf
    • https://s3.amazonaws.com/remavuj/bad_day_songs.pdf
    • https://s3.amazonaws.com/sizadagazagaj/persuasive_essay_writing_prompts_for_middle_school_students.pdf
    • http://pixutixiziv.epizy.com/kerala_state_beverages_price_list_in.pdf
    • https://s3.amazonaws.com/sosupejuxofedo/how_to_turn_on_zone_2_onkyo_tx-nr656.pdf
    • http://sepasuguviwowuk.epizy.com/regusefivotexugukulob.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e967.bin
8ace2b3527653ae617b10084bf5a9b3c42b074f75baa3fbc10d6f6f731af4e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 5204 bytes
font_01_sfnt_off0000fb19.bin
1ec6c18c3588ee81f5a64b6791f4efc779ffb0509190d2029e4aec3425513d54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 10012 bytes

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