Malicious PDF — malware analysis report

Static analysis result for SHA-256 31dcca5981963be0…

MALICIOUS

PDF

71.6 KB Created: 2021-03-18 12:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f595654ff306796cc676af360fde9e7a SHA-1: 9804148164eabcd9cf22932fedbba57203c52990 SHA-256: 31dcca5981963be09e38fe07a45f9d2dc87a11a7458365c65621908f27a328e0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://maypoin.ru/wix?keyword=origins+of+american+government+section+5+answers
    • https://cdn.sqhk.co/bagadogod/jbV5ihr/remetupasobisazesujo.pdf
    • https://cdn.sqhk.co/nowegizin/Aq8d0gf/rubumavagitipasirufej.pdf
    • http://juzufezike.mygamesonline.org/nemexixamizuboridizelosob.pdf
    • https://cdn.sqhk.co/jasurisunav/jP1FhcN/wordscapes_level_8586.pdf
    • http://veviwumifuvemuz.mypressonline.com/what_does_blood_behind_your_eye_mean.pdf
    • http://ronojalad.22web.org/how_many_ounces_in_small_dunkin_donuts_coffee.pdf
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdf
    • https://cdn.sqhk.co/duxadikoti/Biaspp7/vector_21_hot_tub_reviews.pdf
    • http://mosebuzixat.mywebcommunity.org/rinase.pdf
    • http://xirurup.iblogger.org/android_developer_job_description.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://benebobuku.epizy.com/sloe_gin_label_template.pdf
    • http://xotepugiz.rf.gd/firewall_concept_in_networking.pdf
    • https://uploads.strikinglycdn.com/files/8a575392-f34d-4746-adc3-ccd1d792e246/98038642694.pdf
    • https://uploads.strikinglycdn.com/files/ab20c58d-1e21-4dc5-9cee-990e407e7efa/jiruluwadatofexuju.pdf
    • https://uploads.strikinglycdn.com/files/3f26c0f7-136b-4a3d-a4bb-449958465e18/manager_of_technical_services_job_description.pdf
    • https://uploads.strikinglycdn.com/files/a7020c77-aa7e-4156-a217-92730fe44922/what_are_the_best_air_fryer_cookbooks.pdf
    • https://uploads.strikinglycdn.com/files/cea295ce-e4f7-4295-b610-2218d2426a63/86437982756.pdf
    • https://uploads.strikinglycdn.com/files/587dd418-9b1a-4c68-94d6-9903c3971195/whirlpool_cabrio_dryer_wed6200sw1_service_manual.pdf
    • http://satogitexuvo.myartsonline.com/world_map_continents.pdf
    • http://purarugamepamak.epizy.com/convertir_de_gramos_a_tazas_de_azucar.pdf
    • http://nononulavojiki.myartsonline.com/biological_perspective_in_psychology.pdf
    • http://wejelinemadagep.rf.gd/why_was_fahrenheit_451_banned_or_challenged.pdf
    • http://lirolisol.epizy.com/ite_version_6._0_checkpoint_exam_answers.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_off0000da9b.bin
27454cc10bb094874dc010c94e3d8e897b9fd1d50df6083f66d132892429bb70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9B 5472 bytes
font_01_sfnt_off0000ed40.bin
2a988a6d02b7b97a77414ca7883a72d7d62ceb3b80b3dd5b41416780fcfc00b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED40 10368 bytes

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