Malicious PDF — malware analysis report

Static analysis result for SHA-256 316ec62723c6a53a…

MALICIOUS

PDF

73.0 KB Created: 2021-02-16 22:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ae04270ddbf9d5b8167d2be0e368b879 SHA-1: f672fdeb47070ccb558e767103b6d4c02b4515b2 SHA-256: 316ec62723c6a53a20db4563161ea9f0303213b2ae2379df296ed9c075a1eb42
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The embedded URLs point to various disposable domains and file-sharing services, likely used to host malicious content or redirect users to phishing sites. No scripts were extracted, but the PDF structure and numerous external links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=stanford+elementary+school+las+vegas PDF link annotation
    • https://cdn.sqhk.co/vijamabaf/hhhWbeg/stick_run_hack_version_game.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/9f99e0238e2e.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/DmmojgM/16106374982.pdfIn PDF document text
    • http://dimukidiri.iblogger.org/avira_uninstall_tool.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/MLyihFY/anime_live_wallpaper_hd_4k_apk.pdfIn PDF document text
    • http://xujukega.66ghz.com/body_parts_name_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/jjdQ7DT/basketball_times_preseason_all_american.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/ijnajg5/35697159288.pdfIn PDF document text
    • http://mrshadow.net/cytus_ii_aliceh2568.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5fdccfd2b02bb.pdfIn PDF document text
    • http://bestsaleshopin.xyz/pascal_brutal_tome_39rhy8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_600c8ce9701cb.pdfIn PDF document text
    • http://joxexezukefu.22web.org/14042710924.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485926/normal_600090c12117a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimamewaseziwal.epizy.com/14970988684.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_off0000df19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF19 5700 bytes
SHA-256: 9506cf8a47b13650c4ec0dcd08c1afb14de2fc9bc8873428a8037f9b8b06572d
font_01_sfnt_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 10672 bytes
SHA-256: 466404bcd869b9466b31e310da6987161710cf32981255ff4f8c793913b400b7

Open this report in the interactive analyzer, or submit your own file for analysis.