Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e2f9813e68365f…

MALICIOUS

PDF

80.2 KB Created: 2021-03-08 08:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 19b931d483c1a388ada7fce47d2c7838 SHA-1: c3b0c8ea1f55bbe3b242d5cb6eb25b713e9b3fdc SHA-256: 16e2f9813e68365f9657bb5413bbdd8ccfad79da7ce19768caaaa57487cd7399
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous external URLs hosted on disposable domains. The embedded URLs and the PDF's structure suggest an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wix?keyword=mitrice+richardson+mural PDF link annotation
    • https://cdn.sqhk.co/jasurisunav/jhjjLTt/57642144819.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/Tifiajg/gedavivereg.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/gighhgj/manicure_at_home_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5feb72ab6483f.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/elements_compounds_and_mixtures_worksheet_grade_8.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/muvifiralisagisonedaro.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/sda_pathfinder_classes_colours.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/ckhjfnd/63975021846.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/fS7xigp/65955171795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5fe71578b6005.pdfIn PDF document text
    • http://fly-drive.online/warcraft_2_cheats_beyond_dark_portalf3jay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_5fd2f3eea4952.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/6hejaUP/lafisulurufurezi.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/gcFTE8E/pokemon_sword_and_shield_dlc_2_pokemon_list.pdfIn PDF document text
    • http://liolika-rsya.ru/gofuwupigemeboxisr56ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421339/normal_5ffbe296619d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_600ce7fa60977.pdfIn PDF document text
    • http://wiinorama.space/kizedometewamalokesapap2scnn.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/ijheRji/53885391512.pdfIn PDF document text
    • http://tiktokfrance.fun/61716855367m6vgh.pdfIn PDF document text
    • https://cdn.sqhk.co/filemowa/7HjcSAg/nisigixogirimig.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/volume_of_a_cuboid_in_litres_calculator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejobutek.onlinewebshop.net/jizugosimoje.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/12925552658.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/jirejotizubidemozawumafuk.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_off0000fe36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE36 5184 bytes
SHA-256: 40a0d802e1a6d0fa4fa4275192c31f0ce6acfa0c0646af64f1d78b742aa873e2
font_01_sfnt_off00010fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB5 10428 bytes
SHA-256: 513f0cc668a1502a25dd4a8bbfb8a525ab121ebf0ca15e8721ed40fd034ab8d6

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