Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba05ee0690d7e89…

MALICIOUS

PDF

56.1 KB Created: 2020-11-13 14:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3c3e1de1d6ed96bfa0119f6ce47249b6 SHA-1: bec0b6a1b42b93ee196f34e73433dc9f8d7bb71b SHA-256: 1ba05ee0690d7e892b7b3e9856025af9741bdbcff4a8f2a1e8b0dda8c0556fad
234 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier, and it contains a screenshot lure designed to trick users into clicking a link. The embedded link directs to a known malicious redirector, which is a common tactic for phishing or distributing further malware. The file also contains a link farm, suggesting it's part of a larger campaign to generate traffic or distribute content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 56 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://traffmen.ru/123?utm_term=urbini+reversi+stroller In PDF document text
    • https://tudekazesabi.weebly.com/uploads/1/3/4/3/134367585/ed5b51af953.pdfIn PDF document text
    • https://sinisedowinixa.weebly.com/uploads/1/3/4/6/134679082/sakaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc52b62f-8371-4b8f-8360-5155ff77c041/gazukevenegaguwizavikupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6532a54-08c9-4029-a478-2c817eb4eb69/gizazelevexawiwopopikam.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/intercomp_tire_pressure_gauge.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/pokken_tournament_wii_rom_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5856127-0a6e-4b04-b3ae-b2b08f30917c/gutopag.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/55578721803.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/csipsimple_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7779b9a-0742-4549-9544-bcb6e4aff6f1/10005526220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d941783b-e815-477a-9231-806154677255/11779211388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc2e7635-5f5a-4a91-ac8c-5cb889e5db8e/77743074385.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/mukugi.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/cosmos_worksheet_episode_9.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA969 4660 bytes
SHA-256: 7f12eaa7da9b2292fa204028dbf070b98ca69f6eb5d216c38422fc9c8f8f828f
font_01_sfnt_off0000b95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB95B 7704 bytes
SHA-256: effd1018dbc1ef50603c385f6093af161876bf618ce5f5bea30aaf06ab683e26

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