Malicious PDF — malware analysis report

Static analysis result for SHA-256 64546cec10cb8bc4…

MALICIOUS

PDF

72.2 KB Created: 2021-01-11 17:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2bda166ba79b7af9003f2585062c9631 SHA-1: cfaec5c37e793a59c0d641f8f5d1fcdd05b24b6e SHA-256: 64546cec10cb8bc47e4e93ad2a331cbfadc26383ae7abc1602d00af074ef7f5d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to 'traffnew.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

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://traffnew.ru/aws?utm_term=worksheets+counting+to+1000 PDF link annotation
    • https://cdn.sqhk.co/mekaxosur/9qLnhci/81504020108.pdfIn PDF document text
    • https://site-1171887.mozfiles.com/files/1171887/connaught_place_map.pdfIn PDF document text
    • https://site-1178670.mozfiles.com/files/1178670/20368235503.pdfIn PDF document text
    • https://judemozosuduj.weebly.com/uploads/1/3/4/3/134306717/f596bd.pdfIn PDF document text
    • https://site-1176629.mozfiles.com/files/1176629/36870605689.pdfIn PDF document text
    • https://minikugonon.weebly.com/uploads/1/3/4/5/134500064/4426469.pdfIn PDF document text
    • https://site-1172403.mozfiles.com/files/1172403/check_my_electricity_bill_bihar.pdfIn PDF document text
    • https://gavedomosuzutu.weebly.com/uploads/1/3/4/2/134234743/golusatazokabev.pdfIn PDF document text
    • https://site-1171131.mozfiles.com/files/1171131/free_download_song_wrecking_ball_by_miley_cyrus.pdfIn PDF document text
    • https://site-1177580.mozfiles.com/files/1177580/download_free_mini_world_block_art_pc.pdfIn PDF document text
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/47bdbdc27ecba0c.pdfIn PDF document text
    • https://site-1204767.mozfiles.com/files/1204767/78155365418.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jepinebawo/rinitileb.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/shoulder_injury_medical_treatment_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B9 4972 bytes
SHA-256: b39aca2e687777f84530a0fef6284a7798586b48e17ff736e4d66fba6d1c17fc
font_01_sfnt_off0000e2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BD 10340 bytes
SHA-256: fad6d894ddda2adb383ed830e373146292d40f1309527f384bb078e1ded68f70
font_02_sfnt_off00010628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10628 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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