Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c0d346bf0ffea3…

MALICIOUS

PDF

76.4 KB Created: 2021-03-14 02:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd552f1439e494b640085c7a12236c5c SHA-1: cedb05219e532f687579c80efc886bd90bd23b5f SHA-256: e3c0d346bf0ffea3f31c707dec252f628e1991e820eb35bc780d15098ff0e9c9
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 are benign, but one critical link points to a domain associated with phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a tactic to obscure malicious intent or distribute various payloads. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=mystic+messenger+cheats
    • http://easterthjg.com/rumavoruomotg.pdf
    • http://rivepozepuxar.mywebcommunity.org/the_game_of_life_instructions_2002.pdf
    • http://tonedomopoja.scienceontheweb.net/schwinn_deluxe_bicycle_mounted_child_carrier_bike_seat_instructions.pdf
    • http://inostrana.com/xivovijajovaritutoja6qa3i.pdf
    • http://pikejofopon.mypressonline.com/dijefupaxir.pdf
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/61517.pdf
    • http://paxezot.getenjoyment.net/those_who_wait_book_haley_cass.pdf
    • http://metazoaapc.fun/telegram_apk_for_android_4.289iql.pdf
    • https://talaxosukizarom.weebly.com/uploads/1/3/0/7/130775084/6636644.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_8d5235f932bb4ad1ab80efdaf41f44c9.pdf?index=true
    • https://s3.amazonaws.com/gurafoga/dada_bhagwan_video.pdf
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_2b6c3b242a3b4e72b2c644d073b18afa.pdf?index=true
    • http://poduzamilikuki.rf.gd/jekesug.pdf
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_d3306f9ae3d74e81a3f93528de0338cd.pdf?index=true
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_b99417d4d6f144a6992af749ccf8b68e.pdf?index=true
    • https://s3.amazonaws.com/dazinibonofobi/innova_3320_auto-ranging_digital_multimeter_review.pdf
    • https://s3.amazonaws.com/wusone/wufebigawedejofexorinosax.pdf
    • http://girofili.myartsonline.com/how_to_play_old_game_of_life.pdf
    • http://lajuwojuwel.epizy.com/addictive_drums_free_pc.pdf
    • http://zuxulabawiba.rf.gd/15479736921.pdf
    • http://naditoliwinudev.epizy.com/95202084147.pdf
    • https://s3.amazonaws.com/magapeguwabe/indice_de_carcinomatosis_peritoneal.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_off0000ed9a.bin
43e7373c14639ad5306fce6b36af53ad3ec115560cfe753bdcf3f3070abaf614		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 5288 bytes
font_01_sfnt_off0000ff7e.bin
3e74fd43c6c6e604941ce9e792275a703d00b9829c69a5785f4cded867f73dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 10864 bytes

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