Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e73c85b940b54d8…

MALICIOUS

PDF

84.7 KB Created: 2021-03-18 02:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cda80b0617167bb942e9c53f52e208cb SHA-1: 23cd4c0cca78032b0021fac132d6946ae01b6341 SHA-256: 5e73c85b940b54d8d064808f914f99bbcf3aeadf09fd44f232b937a9f36c861a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing lures, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://nipisod.ru/strik?utm_term=how+to+self+study+for+chem+sat PDF link annotation
    • http://nisisigewu.iblogger.org/bootstrap_navigation_bar_with_logo_template.pdfIn PDF document text
    • http://poxinezov.iblogger.org/62078788265.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/jdS7hfk/live_nation_concert_week_aktionspreis.pdfIn PDF document text
    • https://cdn.sqhk.co/jifexekezeli/gdzaihP/underworld_football_manager_bribe_attack_steal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kusuganuxe.epizy.com/paxuzanidi.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_443b3fde4c3d401f9608181888cd789d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zakunafu/mivowojuwafivole.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/alfa_laval_lube_oil_purifier_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/endoscope_camera_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8325023-803a-41ec-8d6e-dd86644db0ee/2651773616.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/avengers_infinity_war_official_soundtrack.pdfIn PDF document text
    • http://fazavoregotula.rf.gd/articles_practice_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/how_much_does_a_hot_springs_hot_tub_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/yowhatsapp_latest_new_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdc33f1-feca-45ea-95e1-8e7b6d65b583/what_is_the_prayer_for_the_dead_in_islam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c9aca7-2967-47d0-8724-3f246db3210b/nevuwawugorotaxuxaguxope.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/bahubali_2_telugu_songs_ing_come.pdfIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_4502380de03d4b6495aa4ce2fc3e6f78.pdf?index=trueIn PDF document text
    • http://nigabosepa.epizy.com/negative_numbers_questions_and_answers_ks3.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_off00010d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 5416 bytes
SHA-256: 08472b2e5c4e65053f14a6b09f9467615a80eb6fcaa1f972af18cb5547ac4854
font_01_sfnt_off00011fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEF 10900 bytes
SHA-256: 4fb0b04e6d54944def5a1c49f0e59d0dc561d25984727a09cc8c70bec48f4828

Open this report in the interactive analyzer, or submit your own file for analysis.