Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44a88c832bff139…

MALICIOUS

PDF

79.9 KB Created: 2021-03-18 16:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6c115fdd8f46f1873e722a757a99c86 SHA-1: 283520deef17b09935a5421a20e410aa9e54fac3 SHA-256: e44a88c832bff139f02a4cf6401bc67d225893dfa422fee990220231311a71cc
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'Payment redirection / bank-detail change lure'. The presence of many external links, including one to 'ponafet.ru', suggests an attempt to redirect the user to malicious sites for phishing or credential harvesting. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a malicious intent to lead users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://ponafet.ru/strik?utm_term=fitbit+flex+2+hard+reset
    • https://ziluxokoker.weebly.com/uploads/1/3/4/3/134392919/8464371.pdf
    • http://mopexaxurip.getenjoyment.net/63880494027.pdf
    • http://rusadezebep.mygamesonline.org/9228038257.pdf
    • http://takipibimaxubov.sportsontheweb.net/ed_sheeran_castle_on_the_hill_acoustic_chords.pdf
    • http://govuled.mywebcommunity.org/23922224527.pdf
    • https://nepibosumu.weebly.com/uploads/1/3/4/3/134363752/kovem-miribixav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jaloto/70810347659.pdf
    • http://jeborawaleko.atwebpages.com/fusosi.pdf
    • https://s3.amazonaws.com/bulolimepol/feviwodopilebebikudu.pdf
    • https://uploads.strikinglycdn.com/files/adc8eba2-261b-4958-b29f-f1ca8c6909c2/how_to_prime_a_kerosene_monitor_heater.pdf
    • https://uploads.strikinglycdn.com/files/ba5af1a7-a311-418e-a471-6c1d1ed318e3/ninoverobuxewekudo.pdf
    • https://s3.amazonaws.com/fakuguvil/tevosa.pdf
    • https://s3.amazonaws.com/jinotugiwomo/dizum.pdf
    • https://s3.amazonaws.com/vesubodufisi/gejonesowofosikabiweg.pdf
    • https://s3.amazonaws.com/tobito/82701619727.pdf
    • https://uploads.strikinglycdn.com/files/18824cba-f6c7-4a99-9188-6c2224887de0/real_scottish_journeys_reviews.pdf
    • https://uploads.strikinglycdn.com/files/169e9be2-4950-414a-b83e-2b0ace02b73a/why_is_space_the_most_important_element_in_architecture.pdf
    • http://pekowob.onlinewebshop.net/architectural_thesis_book.pdf
    • http://xomapagovujux.atwebpages.com/1st_grade_printable_worksheet.pdf
    • https://s3.amazonaws.com/dowavelaxam/emulator_android_ringan_terbaik.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_off0000f9be.bin
18a1d0d4ddfe6270eda12a2e35c0bb2d654bfe42b6322bd031ee9fd430eb812b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BE 5292 bytes
font_01_sfnt_off00010bb7.bin
1dda49e8baecab971c958e7a836d1d43302815e14d21b2fe62cbd9cc45e783a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 10960 bytes

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