Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5682759a9c298a…

MALICIOUS

PDF

77.3 KB Created: 2021-04-03 10:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94f4022a6a57fbc2f45432dbd2b82066 SHA-1: e97bde13701f360268289511e1cdcff207017a91 SHA-256: ac5682759a9c298af0f1f60aafbbb9d48b3e578f1a3890c10d13343031dfae62
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The primary URL, 'https://resalured.ru/strik?utm_term=what+to plant+on+side+of+house', suggests a phishing or scam lure disguised as search results. While no scripts were explicitly extracted, the PDF structure and extensive URL usage strongly indicate a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=what+to+plant+on+side+of+house
    • https://cdn-cms.f-static.net/uploads/4496602/normal_601fd395eb6f4.pdf
    • https://static.s123-cdn-static.com/uploads/4426422/normal_5fece5bf4f9ad.pdf
    • https://deduxujixonegox.weebly.com/uploads/1/3/4/7/134731806/fejuv.pdf
    • https://gazavado.weebly.com/uploads/1/3/4/3/134331045/435132.pdf
    • https://cdn.sqhk.co/monasomeb/du7idii/last_player_battleground_survival_game_download.pdf
    • https://cdn.sqhk.co/jasurisunav/xdihKjd/juegos_de_russian_uaz_offroad_driving_3d.pdf
    • https://cdn.sqhk.co/zogowefu/hg5kib4/23008616727.pdf
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/rofomabenigo.pdf
    • https://static.s123-cdn-static.com/uploads/4366655/normal_5ffb30840ff04.pdf
    • https://cdn.sqhk.co/rozopebak/fhey1aC/dodanulutomumikoj.pdf
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fe3b7d0be695.pdf
    • https://sosojisizavawov.weebly.com/uploads/1/3/1/4/131454692/xepobi.pdf
    • https://zasoliwex.weebly.com/uploads/1/3/5/3/135318241/suvekugovarari.pdf
    • https://cdn-cms.f-static.net/uploads/4369768/normal_60523810af73c.pdf
    • https://cdn.sqhk.co/denepepunuja/eCjd5jb/pewdiepie_tuber_simulator_mod_apk_unlimited_everything_2018.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ratosore.epizy.com/25150303945.pdf
    • https://uploads.strikinglycdn.com/files/98a9da66-4238-45f0-9773-383b1e47852d/how_to_set_up_speed_queen_washer.pdf
    • https://uploads.strikinglycdn.com/files/af6b3a94-8ca5-4e92-ab02-1334976af834/madumufofedep.pdf
    • http://duvuxosejoxogu.rf.gd/baunvo_1990.pdf
    • http://dujepuxa.rf.gd/84770706994.pdf
    • http://bixowufufo.rf.gd/friction_worksheet_middle_school.pdf
    • http://rufegojokod.epizy.com/top_english_albums_2018_free.pdf
    • https://uploads.strikinglycdn.com/files/999dc9eb-ccc1-482f-98a3-30eff4c19d17/jewegapatovase.pdf
    • http://supegawezokex.epizy.com/edmond_de_rothschild_monaco_annual_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f339.bin
6fb692d86fc08f691ca1b509774c0e4ec33188b77ed14dc07cbd1e0a0ea76669		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 5044 bytes
font_01_sfnt_off0001046d.bin
3123a0a07de9606604e62a8d26ac879ea059c60019f1e9c2fbd5f8617321f585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1046D 10376 bytes

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