Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a13f5dc8606325d…

MALICIOUS

PDF

110.6 KB Created: 2021-02-15 16:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0df79bf643bf82d677e9c4e78425e226 SHA-1: 072f315f347f09190195ce2b59fa311ae9a26881 SHA-256: 1a13f5dc8606325d63bcbd83ef357b34c7c5d825e85e490766f2eeef5453fccf
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The PDF's structure and the presence of external links align with common tactics for luring users to malicious 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://maypoin.ru/strik?utm_term=martin+heidegger+what+is+metaphysics+pdf PDF link annotation
    • https://cdn.sqhk.co/xazewizol/Fqhbv9T/game_chickens_for_sale_in_arkansas.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/igj3jju/kasogawogujexemekenepu.pdfIn PDF document text
    • http://goxakawelapa.22web.org/apex_launcher_pro_1._4_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bivatesiromu/jghKiaS/jitudide.pdfIn PDF document text
    • https://cdn.sqhk.co/joxezexukub/Tibibgj/vepik.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ggfggg9/cooking_fever_game_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/hieiixV/the_diplomat_state_college_rent.pdfIn PDF document text
    • https://cdn.sqhk.co/kosuxatune/M5J92ih/find_friends_iphone_location.pdfIn PDF document text
    • http://dedarijaluwonu.22web.org/amica_mutual_insurance_company_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/vjajjtO/bilexinufagonopofesob.pdfIn PDF document text
    • http://kpupnov.pro/mulolawoputuriterub10r20.pdfIn PDF document text
    • https://cdn.sqhk.co/nabixisaf/Gjjjesq/54073780549.pdfIn PDF document text
    • http://batmbatm.ru/xekugezojarugejuwuzukijomziok5.pdfIn PDF document text
    • http://tgesheff.xyz/zoveseravulewsm2ga.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/ghjfgda/64577012130.pdfIn PDF document text
    • http://techanomic.com/ars_magica_magic_system0tnca.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/Hihkhhp/homemade_scoreboard_basketball.pdfIn PDF document text
    • https://cdn.sqhk.co/naketego/ZTjaujH/shark_ion_p50_ic162_lightweight_cordless_upright.pdfIn PDF document text
    • http://trixy-matrix.space/xowezekibigiwujuvub7b0hs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozijirume.rf.gd/4482301905.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_off000170b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170B5 5736 bytes
SHA-256: 7a8d642fc9e7dc13976b04c32d86a1ca0bf8e12f29e4711b67cd7ccc928c7fd4
font_01_sfnt_off0001843f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1843F 12412 bytes
SHA-256: 813e5856adab30c18b7f568451fd82e6dbacf524e76d49cd1237b7060d913768

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