Malicious PDF — malware analysis report

Static analysis result for SHA-256 9540dbae05492233…

MALICIOUS

PDF

71.0 KB Created: 2020-11-26 07:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cce2caad10d7289fac45b2d9a4720cd1 SHA-1: 1681f966fd18b84d981b85382143e89fcf1f77e4 SHA-256: 9540dbae0549223322c5f02998e1951dcc039309a5228ac1ba3d0fcb9855ddfc
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=cantos+de+entrada+para+misa+tiempo+ordinario In PDF document text
    • https://disipewadapa.weebly.com/uploads/1/3/4/8/134870645/1031234.pdfIn PDF document text
    • https://jejaxome.weebly.com/uploads/1/3/4/4/134443668/547090bc067.pdfIn PDF document text
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/6b09a1aa896ea8.pdfIn PDF document text
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/209265.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/pafotudatarepekuk.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/34026378-0e2a-4b5e-913e-16ca390356fb/47687922370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5dcecb-7769-4321-b0ab-941a25c3d699/pinasitoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd5f1c1-d45d-4dad-8e2a-e8d60e50d113/36487819667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2415ed7-46d7-4bc8-96f1-408bd174b888/92391105871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ec4676-effe-402c-a1e9-af8f86738370/94112711982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd9e27f-0708-42f8-97db-65a93d7c5ea4/102138902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27387b33-55ea-4b3d-92a0-42a7e9bab906/public_enemy_fight_the_power_video_with_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/crocodile_dundee_3_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/secret_bridesmaids_business_episode_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75397c77-4b67-48b9-a4b4-d7fbb6f302a1/nowalawalolagujegoguremem.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_off0000d7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D6 4976 bytes
SHA-256: b362251c3a26c28594ed3693c55a2300376d04e60450eca0d7c3742735c44823
font_01_sfnt_off0000e8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 11308 bytes
SHA-256: 14c1c7ec5349c6fb2b02f1c1e63c17ef30d2d00274c88a6543f7e7f210526451

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