Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9816e87ce0c1dc7…

MALICIOUS

PDF

66.4 KB Created: 2021-02-26 08:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6409219ed6b7730a77d1ba8825d6d67e SHA-1: 3085e094ea49a586a62f5b37eff38f59eb5384d5 SHA-256: e9816e87ce0c1dc745f891322c174c1eeab358c9078b4c4dc3f56a833a4a5c33
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or SEO spam lure. It contains a large number of external links, many hosted on disposable domains, designed to redirect users to other sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a deliberate attempt to manipulate search engine results or direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/aws?utm_term=wahl+total+beard+trimmer+charger PDF link annotation
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/6113389.pdfIn PDF document text
    • https://kezexawu.weebly.com/uploads/1/3/0/8/130814062/7628004.pdfIn PDF document text
    • https://mifadugusukar.weebly.com/uploads/1/3/5/3/135337027/834042.pdfIn PDF document text
    • http://mujetogavafe.22web.org/navarre_bible_old_testament_paperback.pdfIn PDF document text
    • https://zoforute.weebly.com/uploads/1/3/4/3/134352948/zibaxalesefadoz.pdfIn PDF document text
    • https://cdn.sqhk.co/papazokixe/FbgfgjT/tetris_effect_connected_game_pass_vr.pdfIn PDF document text
    • https://sazaselofodufo.weebly.com/uploads/1/3/4/5/134590081/1996918.pdfIn PDF document text
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/tebuwar.pdfIn PDF document text
    • http://milanbeachs.space/download_game_oddbods_turbo_run_modojhza.pdfIn PDF document text
    • http://habirovradik.ru/wovukijakonurupitutaxawu15wor.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/igihDgj/walmart_inventory_robot.pdfIn PDF document text
    • https://juzoliposiwe.weebly.com/uploads/1/3/4/3/134322138/33298f5a.pdfIn PDF document text
    • http://salonhq.xyz/nidewifalusizowagexizotvru.pdfIn PDF document text
    • http://nomanodix.iblogger.org/facebook_frame_template.pdfIn PDF document text
    • https://satewode.weebly.com/uploads/1/3/1/4/131407014/7047502.pdfIn PDF document text
    • http://priz24.site/bullhorn_peoplenet_timesheet3mdgq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://besuwodusibix.rf.gd/biggest_affiliate_platforms.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_off0000c3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DD 5328 bytes
SHA-256: 16551af59949271892f9dbc3ab70888492b3158368d46baef43126abff2e929a
font_01_sfnt_off0000d5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DA 10992 bytes
SHA-256: 05f2cb62d320a1045fe3889bdbda500599f7d2f0c612073cd60457ff80cef6c9

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