Malicious PDF — malware analysis report

Static analysis result for SHA-256 067f3fce65b153a5…

MALICIOUS

PDF

82.7 KB Created: 2021-01-23 07:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 72869788ee89feb4238c6e3e51069399 SHA-1: ef3c2fac7b41392cea04a2bc45b1403ff6a3b45e SHA-256: 067f3fce65b153a58ef11c15d72cd5d2f28006ceff1e38482fd3a8b56554133c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on external domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the structure suggests the PDF is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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 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.
  • 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=zihale+e+masti+song PDF link annotation
    • https://cdn.sqhk.co/natefisaka/egge3hf/offroad_pickup_truck_driving_simulator_apk.pdfIn PDF document text
    • https://zutiwemozebej.weebly.com/uploads/1/3/2/7/132712207/6747764.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/gjaaRsM/japanese_english_picture_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/gisopagipize/ihgvBhh/drive_shaft_boot_leaking_grease.pdfIn PDF document text
    • https://site-1166703.mozfiles.com/files/1166703/26125137335.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/aCeElgg/neptune_retrograde_meaning_2020.pdfIn PDF document text
    • http://mawifit.iblogger.org/airport_manager_2_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/pasawe/semi_formal_attire_for_wedding_sponsor.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/23029034727.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010d22.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10D22 19552 bytes
SHA-256: 3e3f0630b8564b944ca1857214fbecec6ec7d3a7b6b253ff7e3e3304d76d4a86
font_00_sfnt_off0000d77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77E 4960 bytes
SHA-256: ead0ab39b9ce8178831eefa45bbc4f63794dc0fae3db79a04edaf7901d0ab018
font_01_sfnt_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 10692 bytes
SHA-256: 8d447a009cac54f4eb04e84c3cf36bb1af570586e898f6d1701bc4e41513d5ec
font_03_sfnt_off00012c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C70 4832 bytes
SHA-256: aa8dcc8fd4a3760c971b46331a139d0da64912dfcfddc8c5bd7b5dde0f1d436b

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