Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ceb1f7655490be…

MALICIOUS

PDF

75.7 KB Created: 2021-06-11 01:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a904388338774bbbbbace578a92e0be1 SHA-1: ceb61c0a2586cc956ab0e971cca1205d7734adae SHA-256: 80ceb1f7655490bee4c4def6e04b6c2a7c842b8027ff5eebbbc04b3166b7bb2d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://infrive.ru/pbw?utm_term=free+photoshop+styles+2020 PDF link annotation
    • https://tojalalegeb.weebly.com/uploads/1/3/4/5/134584715/tifolixuro.pdfIn PDF document text
    • https://pebizadovabunal.weebly.com/uploads/1/3/4/7/134711288/mesanosikidujow.pdfIn PDF document text
    • https://xatefokagakutil.weebly.com/uploads/1/3/4/1/134108848/9636c152e.pdfIn PDF document text
    • https://gizunujidibe.weebly.com/uploads/1/3/0/8/130814387/rikuwebetafimuren.pdfIn PDF document text
    • https://kibixaxetoro.weebly.com/uploads/1/3/4/8/134861284/nimufuniw_tarenufe.pdfIn PDF document text
    • https://kalitawolilog.weebly.com/uploads/1/3/4/8/134860066/lavojum.pdfIn PDF document text
    • https://kubazavazagemu.weebly.com/uploads/1/3/4/4/134464578/400e6c31d8903.pdfIn PDF document text
    • https://bibeluwevolaru.weebly.com/uploads/1/3/4/4/134497964/9046864.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ladopupog.pbworks.com/f/luwewon.pdfIn PDF document text
    • http://niluputevi.pbworks.com/w/file/fetch/144698202/explain_data_transfer_instructions.pdfIn PDF document text
    • http://pinurakus.pbworks.com/f/josukenipozigugoluf.pdfIn PDF document text
    • http://zuwuzemoj.pbworks.com/f/40101611399.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/f/14536427411.pdfIn PDF document text
    • http://taxoxuf.pbworks.com/f/zedoz.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/f/can_mist_pot_cit_be_used_to_treat_urinary_tract_infection.pdfIn PDF document text
    • http://banusiv.pbworks.com/f/akll_defter_indir_6._snf.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144990180/monazemegapamesigaberaje.pdfIn PDF document text
    • http://dukujaxosap.pbworks.com/f/18000353627.pdfIn PDF document text
    • http://fokurid.pbworks.com/f/90601296261.pdfIn PDF document text
    • http://fijovolumi.pbworks.com/w/file/fetch/145045944/coin_master_mod_apk_3.5_112.pdfIn PDF document text
    • http://marutipug.pbworks.com/f/1242211338.pdfIn PDF document text
    • http://safubudesowi.pbworks.com/w/file/fetch/144881361/tudodag.pdfIn PDF document text
    • http://lojefizowoj.pbworks.com/w/file/fetch/144944727/undertale_free_download_2020.pdfIn PDF document text
    • http://gexufak.pbworks.com/w/file/fetch/144606252/fejaxupasu.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_off0000eafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 5028 bytes
SHA-256: 0099f70a62864ec01a53d83e46354f4d8d74f396b1ef06b4929ea92272a1ff4a
font_01_sfnt_off0000fc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1E 10912 bytes
SHA-256: 809171f89870cf5255324446ec7f63f6f3b491e2c7d503990d1f94867505273a

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