Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb106f570fdaad04…

MALICIOUS

PDF

69.9 KB Created: 2021-02-23 02:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dd243797087e3ad2ddf51dbb005d90f4 SHA-1: 70ebcb60ea93e4687b8ec18c78745f4930bf6f5c SHA-256: fb106f570fdaad042c17ae001b48c5e65b2a5aa37c3652b230ac4808585cdb93
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting it acts as a downloader or redirector. The document body, though partially corrupted, contains keywords related to a manual, which is a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/wix?keyword=nissan+sentra+2004+fuse+box+manual PDF link annotation
    • http://accueilcmb.com/competency_based_questions_for_team_leader26y9z.pdfIn PDF document text
    • https://feposejixadolo.weebly.com/uploads/1/3/4/7/134744373/3303534.pdfIn PDF document text
    • https://fofonamid.weebly.com/uploads/1/3/4/8/134869219/zirotuzi.pdfIn PDF document text
    • http://babysampler.com/mitosis_and_meiosis_chart_answer_keyusehl.pdfIn PDF document text
    • http://cooldomen.space/valugebedixn052k.pdfIn PDF document text
    • http://detonic-ordina.website/5023994709zowfq.pdfIn PDF document text
    • http://maroron.22web.org/messenger_dark_mode_app.pdfIn PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/1e1348e1cf7f6.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzutuse/fidPTif/detodazimodozinitedewep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/canningvale_mille_sheets_review.pdfIn PDF document text
    • http://jezawijevot.rf.gd/30327639288.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/all_defence_job_full_form.pdfIn PDF document text
    • http://vimabamavarona.epizy.com/one_touch_ultra_2_test_strips_100_count.pdfIn PDF document text
    • http://zawomebi.epizy.com/alberta_child_care_incident_report_form.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_off0000d3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FA 5452 bytes
SHA-256: 42ff857f6ef1034d85a896cdb0f9512249d6f4e5b60be76b5681cf1d12af4fa4
font_01_sfnt_off0000e67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67B 10492 bytes
SHA-256: d4329ce609d2e46c3ab4f318f780862642c3fbd9a59310e9b5bf92acc3d4c795

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