Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06f30b0d2587d4d…

MALICIOUS

PDF

83.4 KB Created: 2021-04-06 05:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 064184e22f8d5ca652e5d03a1cdc96b7 SHA-1: 7302a5a082315dbeeb7aa97b2cde9e9822e00c3e SHA-256: a06f30b0d2587d4d83a78e7a4375d3856ff4b9ff7a4b1ceb8d6f02624879dbaa
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. It contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=lenovo+thinkpad+t430s+i5+specs PDF link annotation
    • http://ryduslim.website/game_attack_on_titan_apk_terbaru0yion.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/Vmc7bkp/zimatujepevidik.pdfIn PDF document text
    • https://fiwixenolo.weebly.com/uploads/1/3/4/4/134493020/vefurufib.pdfIn PDF document text
    • http://bigezidara.mypressonline.com/belajar_bahasa_inggris_tanpa_rumus_grammar.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/jgjabjh/cours_ista_gestion_des_entreprises.pdfIn PDF document text
    • https://cdn.sqhk.co/dudavizi/ZbMhcAl/pinot.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/cercanias_barcelona_plano.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/icd_11_online.pdfIn PDF document text
    • https://sisekiki.weebly.com/uploads/1/3/4/6/134622657/ripitip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445338/normal_5fda49ebf343f.pdfIn PDF document text
    • http://storeyou.store/74915222318ztjn4.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/jiWiilq/color_shift_3d_print.pdfIn PDF document text
    • http://jumbochecker.com/96645263220gk62p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_6059bc673c365.pdfIn PDF document text
    • http://tamakar.tech/44814299487t1wyc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446382/normal_5fd186babe5d6.pdfIn PDF document text
    • https://gibiboxovozigux.weebly.com/uploads/1/3/4/7/134722082/lurodarope_lejidilodunoved_vugowujanas.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/kobudebonusuvixavelur.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/hasjaiU/marketing_strategy_planning_definition.pdfIn PDF document text
    • http://bigwin-1xbet.fun/sap_bo_4._2_sp05_installation_guide8h7a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412773/normal_5ff0b1b46b92d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_6cf0d2bc54704ea48dad8612680ef69c.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_b365b4b0ff924b4b90bd9e11d689e99a.pdf?index=trueIn PDF document text
    • https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_e137bfba0700471396001a5b193188ea.pdf?index=trueIn PDF document text
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_6e9adcac7cc44fd598d6e1e5fb6ab05b.pdf?index=trueIn 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_off00010800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 5616 bytes
SHA-256: 0087d3ccbadf32c32732b9ea8ca059413f5ac84582d23c9466f6915e8c075383
font_01_sfnt_off00011b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B31 10772 bytes
SHA-256: fd30068bd86afc4c393dee7ad5f7515d730adb9be656c5efbaad6bcaf60c11a9