Malicious PDF — malware analysis report

Static analysis result for SHA-256 d427dae679595794…

MALICIOUS

PDF

109.8 KB Created: 2021-03-14 01:37:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: e733a697b8b045f556fbc2898b207937 SHA-1: 5628e481c2140193e12881fc0064f29b1ec6733b SHA-256: d427dae679595794d409c5f12d13b7aac75b78eefa1ce91ee041ff29bbc4662f
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The presence of external URIs and the link farm behavior suggest the document is designed to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/wix?keyword=red+tides+art+of+war+guide PDF link annotation
    • https://dejokorakas.weebly.com/uploads/1/3/1/3/131379117/xibetuzukuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484806/normal_5fdd25a0c8c0e.pdfIn PDF document text
    • http://gilogaviteno.iblogger.org/317554512.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/how_many_calories_does_sweet_corn_have.pdfIn PDF document text
    • https://namowabe.weebly.com/uploads/1/3/4/0/134000139/pudiraxilal.pdfIn PDF document text
    • http://sidikapefujuxe.22web.org/43128859314.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/will_no_game_no_life_ever_get_a_season_2.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/jidom.pdfIn PDF document text
    • https://renibopasuviwi.weebly.com/uploads/1/3/4/3/134305424/wiwegisuxib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421776/normal_5fe87300b1c3b.pdfIn PDF document text
    • http://tokujanorix.iblogger.org/washing_machine_not_spinning_properly_beko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_6044943c94f4a.pdfIn PDF document text
    • https://mabuvolud.weebly.com/uploads/1/3/1/4/131453706/9166914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_603e294787ded.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489713/normal_5fe2f0399233c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5ff12dab9ae19.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/jolafit_loxemax_tapewajotoguve_muxalawijox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403940/normal_600b6f3d29358.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/who_invented_the_first_steam_train_in_victorian_times.pdfIn PDF document text
    • http://litorow.myartsonline.com/english_verb_list_with_spanish_translation.pdfIn PDF document text
    • http://vonimamodiji.rf.gd/49855967534.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 46664 bytes
SHA-256: 80915910ff473d3e2210a27e2753b045c366e2cc854c88f6391ea438f64c114b
font_01_sfnt_off00017247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17247 5140 bytes
SHA-256: 7f4b2311706144ff99810eb9808dafeaa2382c7327a94f221873d48613261ed8
font_02_sfnt_off000183eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183EB 10528 bytes
SHA-256: 976255fa32ecbc705fdda2331a4bf0a3dd85a223f3ae90b33be48d887d277bc9

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