Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3066a95f7ee015…

MALICIOUS

PDF

82.8 KB Created: 2021-03-20 18:15:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d586b8862673546562332f9c34f71206 SHA-1: d9ce279516ee9f2d6bff1c58d928aff86677538b SHA-256: 1b3066a95f7ee015ace55eda7e4f5bcfd4472a7e1e60608d6b9dcedf91fc2f60
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://jumiwimov.ru/strik?utm_term=meyers+e47+snow+plow+pump+wiring+diagram', is likely part of a phishing or scam campaign. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=meyers+e47+snow+plow+pump+wiring+diagram
    • https://jizidetaji.weebly.com/uploads/1/3/4/6/134626841/betekobufemara-tepuborodanan.pdf
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/fivuvibor.pdf
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/a30656a784b6395.pdf
    • https://zorimogitew.weebly.com/uploads/1/3/4/4/134487520/2441492.pdf
    • http://zufudaduj.iblogger.org/70205238563.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0b0c5b48-06ab-433d-8a37-d035d9fc931d/free_tableau_training_and_placement.pdf
    • http://suxugumisa.epizy.com/marvel_heroes_2016_pc_game_free.pdf
    • http://zepurudevivo.rf.gd/cahier_des_charges_application_mobile.pdf
    • https://s3.amazonaws.com/muwemivumazulax/keylogger_keyboard_android_apk.pdf
    • https://s3.amazonaws.com/sajatesawodiji/kipavofavawovivumun.pdf
    • https://s3.amazonaws.com/jupevuxirapi/dexinomagumebiruki.pdf
    • http://libejejizu.epizy.com/begobotogozumalolenerev.pdf
    • http://wifudozakiteg.epizy.com/bacterial_transformation_methods.pdf
    • http://xanunomoz.rf.gd/befar.pdf
    • http://wuburujezajewix.epizy.com/north_america_map_with_cities.pdf
    • https://s3.amazonaws.com/xulikamul/does_esmeralda_fall_in_love_with_quasimodo.pdf
    • https://s3.amazonaws.com/kudufigunabi/audio_song_of_krishna_bhajan.pdf
    • https://uploads.strikinglycdn.com/files/f1a59b4f-8147-45b7-8465-ba688bf4efcc/94485715725.pdf
    • http://makowadoka.epizy.com/goxomutox.pdf
    • https://s3.amazonaws.com/rebomedug/causes_of_depression_journal.pdf
    • https://uploads.strikinglycdn.com/files/ec4d7787-3e7c-4ff7-ba23-5d4abb3c1cca/how_to_learn_arabic_language_free.pdf
    • https://s3.amazonaws.com/bisegilupuf/amma_cheppindi_songs_naa_songs.pdf
    • https://s3.amazonaws.com/dinisemowoge/nutoxuvirovubusogaze.pdf
    • https://s3.amazonaws.com/jedadokuti/algebra_unit_2_review_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_off00010713.bin
c40928076e33e065783272d826023c58df7c72ec2ea1ac687ef55e0b7e25dad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10713 5648 bytes
font_01_sfnt_off00011a6b.bin
95e21387e192ffcd08a60c572ac81b02c1fcac512129370158c242ea1c822995		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6B 10412 bytes

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