Malicious PDF — malware analysis report

Static analysis result for SHA-256 395bc6ff2ce113a0…

MALICIOUS

PDF

65.2 KB Created: 2020-12-19 14:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d75b29ec3ca6f11edc6e265617a2ca0f SHA-1: d837ca1f88ee9b49e60a1b2c151f5876a10532d5 SHA-256: 395bc6ff2ce113a09ae35ba97eebe4f61bc2264b3ff73c66daa21e0f37dbe705
274 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Beaverton ontario library hours' and application metadata, suggesting a lure. The presence of a password-protected archive lure heuristic indicates an attempt to bypass security controls by encrypting a payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ggtraff.ru/strik?utm_term=beaverton+ontario+library+hours In PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/wuropu.pdfIn PDF document text
    • https://zenerabu.weebly.com/uploads/1/3/4/8/134870876/vowebizibivegok.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/2284070.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/bcc6deba8ceb.pdfIn PDF document text
    • https://ShopTheBookCorner.as.mIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satudifin/inductive_reasoning_questions_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0b4ebc819f1cf49fd080/1606290255121/gidam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25685a68-8b1d-4e3b-bc90-42d072092057/93681528528.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/sports_head_tennis_open_unblocked_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06da12c4-eb1d-4835-8904-4a9b7bd2a580/pusivefasolepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6e43e6-1cc3-414d-9209-b1a7287b4c2b/5541073010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf6e286-929a-43fa-bd52-a4ef098f9dbc/pofapiz.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/adverb_worksheet_for_6th_grade.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_off0000c0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C1 5124 bytes
SHA-256: d6c3a6cbc86950c91738e3d502ebd52b41dc99f7c0538fcc3f81c6c3cb8c8dfe
font_01_sfnt_off0000d235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD235 11248 bytes
SHA-256: 35fffbd2f4cb7c45903b32985f766504d9ea56a3f9c82fa24f65e7c5f51341f4

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