Malicious PDF — malware analysis report

Static analysis result for SHA-256 802b8618585df548…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 12:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f6fd92cec48a7fcf2e8317995a216b28 SHA-1: d8d43f009d7f6c2600dece4df3fd87f70b84bcfe SHA-256: 802b8618585df548044a024ee3659cf5566fa9ddd2c4b2b88160c0ea93cb42de
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on 'https://xezojetit.ru/award?keyword=addition+and+subtraction+strategies+grade+2+pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://xezojetit.ru/award?keyword=addition+and+subtraction+strategies+grade+2+pdf PDF link annotation
    • http://mylic.ru/pawejazufoxupizipe1ubg9.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/cgigdhg/todibefubabeko.pdfIn PDF document text
    • http://fineagencyy.com/71970335977klwie.pdfIn PDF document text
    • http://a1metromovers.com/what_filter_for_ridgid_16_gallon_shop_vacagcc7.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/gcig3Qc/personal_sticker_maker_pro_apk.pdfIn PDF document text
    • http://dalejupoguj.22web.org/hp_officejet_6500_wireless_setup_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sawowudin/ikicN54/62785542921.pdfIn PDF document text
    • http://subumobo.22web.org/word_unscramble_cheat_sheet.pdfIn PDF document text
    • http://bonboxstudio.com/burgers_king_near_me_nowl669t.pdfIn PDF document text
    • http://gta-msk.ru/votabufu1w0g.pdfIn PDF document text
    • http://netlysy.online/rabiniwitanegato924h.pdfIn PDF document text
    • http://soldonlakewood.com/63355449698wq5w8.pdfIn PDF document text
    • http://phtech.site/nupanupirevaze9k2tv.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/2117435531091chq.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/dZUjiic/vr_games_2020_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/bjasBii/masterminds_guntur_hostel_fee_structure.pdfIn PDF document text
    • http://relax35.ru/4043077448ft7fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://busilumun.rf.gd/florida_boat_bill_of_sale.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/lepunox.pdfIn PDF document text
    • http://sidajewaset.epizy.com/tijokufuxa.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_0e7f91372bfc4390ace958697c3de551.pdf?index=trueIn PDF document text
    • http://fewuzefar.rf.gd/17207848214.pdfIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_d8524a446b6e4dbe80af105d4c16f930.pdf?index=trueIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_cd2fe6437b544274b098819b9f0b79b7.pdf?index=trueIn PDF document text
    • http://femodizabofowu.epizy.com/arduino_bluetooth_android_joystick.pdfIn PDF document text
    • http://zaveravezujob.epizy.com/jvvnl_junior_accountant_notes.pdfIn PDF document text
    • http://najudugofuk.rf.gd/walking_dead_comic_book_12.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_55b6d67ced45469b99d67169af18822b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 5432 bytes
SHA-256: ac8c039226ee7120eb00bd6aad7ff91d097b9fc6d78ddf28816c5fc49fb245f7
font_01_sfnt_off00010139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10139 10712 bytes
SHA-256: bf601d9021e521d5492aa557f6a6ca1975b8d052d31e510d0a17ae9ac3694cff
font_02_sfnt_off000125e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71