Malicious PDF — malware analysis report

Static analysis result for SHA-256 c725f972194093ea…

MALICIOUS

PDF

85.3 KB Created: 2021-03-19 17:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5cc35e8f39adf8b3b297ea31189f956b SHA-1: 790e2ce4bccf2a2aafd0f62474eda85e629a01b1 SHA-256: c725f972194093eaef3392e613c31bcabd196c95d2d2f4517da4e5798156a891
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, suggesting it functions as a link farm or a distribution point for further malicious content. The presence of external URI heuristics and the 'PDF_SEO_DISPOSABLE_LINK_FARM' firing strongly support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/strik?utm_term=review+bosch+300+series+dishwasher PDF link annotation
    • http://rezotu.xyz/lijuxoxukef4ndhw.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/xegatajefiduvuvuwidenen.pdfIn PDF document text
    • http://universal-kirov.ru/aicha_cheb_khaled_songag1nl.pdfIn PDF document text
    • http://mazafaka69pussy.online/13685793036wwa1l.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/kenmore_coldspot_model_106.511_water_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/igjUgif/stumbled_meaning_in_malayalam.pdfIn PDF document text
    • http://bahis-sikayet.com/welufiwuzonuveg59ze3.pdfIn PDF document text
    • http://cardio-natural.info/46re_reman_transmissioneo6yx.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/20429685282.pdfIn PDF document text
    • http://vertigoa.online/xexusjcoai.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/vivapefuwadigo.pdfIn PDF document text
    • http://kafidovomiguvo.mywebcommunity.org/44868512283.pdfIn PDF document text
    • https://cdn.sqhk.co/rurizibaxami/mgjqjfc/knock_me_down_lyrics_keri_hilson.pdfIn PDF document text
    • http://catsism.com/13583596755uo2zi.pdfIn PDF document text
    • http://shoop-fe.ru/capites_do_brasil_a_saga_dos_primeiros_colonizadores1tdrk.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/dEhhukF/burger_time_merced_ca.pdfIn PDF document text
    • http://compte-cmbretagne.best/durgasoft_advanced_java_notesw3nkp.pdfIn PDF document text
    • https://cdn.sqhk.co/rakapuvad/lYMaSHa/android_studio_emulator_black_screen_windows_10.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/xumagorosul.pdfIn PDF document text
    • http://suvonenexazu.mywebcommunity.org/panomobevibolibutofopi.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://toxanezijar.rf.gd/cebus_albifrons.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/58539385400.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/how_to_use_the_oster_bread_maker.pdfIn PDF document text
    • http://devoleresi.rf.gd/36602998136.pdfIn PDF document text
    • http://xosabunaledepof.rf.gd/que_significa_educacion_diferenciada.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_off00010087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10087 5200 bytes
SHA-256: 23d487924d7ca91ddf659cf63dd2579901e066d535f4e10983eb9759795295e8
font_01_sfnt_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 11308 bytes
SHA-256: 636757f12731332e3b800d7c6b5dce529268d5d884cb303395aef1ce6e7a8450
font_02_sfnt_off000138ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138EC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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