Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee89cdbb0116f05…

MALICIOUS

PDF

75.5 KB Created: 2021-03-19 18:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60b394b456d7a5d92b654293e846e0c4 SHA-1: 7c345556bc322a6e662999faba406119e9e9a502 SHA-256: bee89cdbb0116f054104612a2ad3aa4ba0a60d0abad96c6dbd2eb726a9b459cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, indicating it functions as a link farm, likely to distribute malware or phish for information. The primary malicious URL identified is https://xezojetit.ru/123. No scripts were extracted, but the PDF structure and link farm behavior suggest exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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-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://xezojetit.ru/123?utm_term=talisman+digital+edition+apk+chomikuj
    • http://bitejes.iblogger.org/napubozotizu.pdf
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/ramopate.pdf
    • http://easycreditscore.info/personal_statement_for_cv_templateyuts4.pdf
    • http://tersq.fun/boy_in_the_striped_pajamas_gretel_quoteskiv4l.pdf
    • https://laxukiwu.weebly.com/uploads/1/3/1/0/131070933/gumudinomap-navokuravufe-velabon-potodaziza.pdf
    • http://jilunagobag.22web.org/82224918189.pdf
    • https://dosukasexu.weebly.com/uploads/1/3/1/6/131637789/miwebomekido.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tezajiduzut.epizy.com/partnership_agreement_template_word_document.pdf
    • https://uploads.strikinglycdn.com/files/8adc57b6-f572-4377-8d29-ccbaf150675a/what_is_a_synonym_for_touchable.pdf
    • https://uploads.strikinglycdn.com/files/f5d057fc-8d16-4c07-8727-208edeedb385/73582351770.pdf
    • http://moxevigevawoko.epizy.com/sinamokogus.pdf
    • https://uploads.strikinglycdn.com/files/b0eb1abf-180d-4c62-9761-b148ecc01f18/53747777797.pdf
    • https://s3.amazonaws.com/xisefowu/3_functions_of_social_work_supervision.pdf
    • https://uploads.strikinglycdn.com/files/46b632e2-9e1a-4aa2-94e2-1daaff330676/whirlpool_wfc7500vw2_drain_pump_filter.pdf
    • https://s3.amazonaws.com/varolexexus/90132656007.pdf
    • https://uploads.strikinglycdn.com/files/c5455392-c857-4f0b-a1e7-1ab7c9d56e9a/sabertooth_z77_compatible_video_card.pdf
    • https://uploads.strikinglycdn.com/files/ffd5897e-8eef-4db0-bb29-e37f3956a2a3/fijojinepasikudabeki.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_off0000db70.bin
fc3e08033a877f73b9e142bbf5a532d72fdbb008e94ec66accd75a702ab00cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB70 5480 bytes
font_01_sfnt_off0000edf9.bin
cf46797c130fb86209c851cb6b26ec7d8f30c34fe2c3ba069e16b352235b3783		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 17144 bytes

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