Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc3ed3bd8a88ef0…

MALICIOUS

PDF

120.8 KB Created: 2021-04-02 00:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8c337850b9c5b92c578e778e1bccb83 SHA-1: 8385c7f4e4b6884c18263c2a74afd66e1d2ddb44 SHA-256: fdc3ed3bd8a88ef035f3c92dc52a4c8e2c95e9794383ea070845c4b32929e6fa
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many of which point to domains commonly used in link farms to obscure malicious destinations. The primary URL suggests a lure related to a "survival handbook PDF", likely intended to trick users into clicking through to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=the+sas+driver%2527s+survival+handbook+pdf
    • https://cdn.sqhk.co/jivonaxadu/ahedgfc/wavunepifewune.pdf
    • https://cdn.sqhk.co/wubunepan/Ghdhg17/zilixozigegevos.pdf
    • https://cdn.sqhk.co/kibizatududo/dhaW5Rg/football_scores_online_games_download.pdf
    • https://cdn.sqhk.co/mutuwatu/V9TUicz/xudaji.pdf
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/8229635.pdf
    • http://islemleriniz.org/xepivowomunemome4d9m8.pdf
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/7079113.pdf
    • https://tonibakak.weebly.com/uploads/1/3/5/3/135346506/fimazi.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://cdn.sqhk.co/xiroxozalal/goHLJjb/arrowood_golf_course_homes_for_sale.pdf
    • https://xomugewobi.weebly.com/uploads/1/3/0/8/130814749/1896876.pdf
    • http://itclick.pro/how_much_do_professional_magicians_maken153w.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8f1bb45c-226e-4801-b64a-0969f470f777/honeywell_humidifier_6009_filter.pdf
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_04fe2811fb5c4a628f74f04b82a2e2b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/21ca256e-42dc-46e3-89c4-c99726ba5c64/ncaa_division_2_football_conference_standings.pdf
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_f3b87430cacf414d9a9753eba2b6fd78.pdf?index=true
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_df91df382a924bd788e7f3e9159292a5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fb42e237-32f6-426b-aa65-5d6d7b23b73e/zutesigamizazewaturad.pdf
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_d5e810eecc7240dcac50c1cb49f64ed3.pdf?index=true
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_a8927167dd774fd6ab25a0efb9367011.pdf?index=true
    • 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_off000198cc.bin
3f141fc4e02270d7b436ab6b664c8d28e96338ac15e36483d9a3d1421fe4f883		 pdf-font-stream PDF embedded font (sfnt) at offset 0x198CC 5376 bytes
font_01_sfnt_off0001ab13.bin
cc24ca9d9665b2def7c8c0010b753a3d74a912ae8d3fdf2c5e9145befe6b300d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB13 13120 bytes

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