Malicious PDF — malware analysis report

Static analysis result for SHA-256 691c526397600ca9…

MALICIOUS

PDF

77.1 KB Created: 2021-04-15 04:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbe2e0582f5a0ec6b405b7f28848e243 SHA-1: 97e91ab7e575340ce6e78e6eb282b386b51eae7e SHA-256: 691c526397600ca994c40b546ed225bf6b616f270a64d29fbe62c6815cc154d4
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by multiple heuristics, including ML_NYX_PDF_MALICIOUS and SE_ADVANCE_FEE_SCAM_LURE, indicating a high likelihood of malicious intent. The document's content and embedded URLs suggest it is part of an advance-fee scam, likely attempting to trick users into clicking malicious links to further the scam. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://nipisod.ru/strik?utm_term=boss+dd+500
    • https://cdn.sqhk.co/seworani/gxhicij/16267396334.pdf
    • http://lixebafevoku.mypressonline.com/pneumonia_ppt.pdf
    • http://sesizuxewewax.mygamesonline.org/tezupupawetere.pdf
    • http://javaxirivibewi.mygamesonline.org/zowelutezufewijekivufil.pdf
    • https://cdn.sqhk.co/zewesifadeka/MKvhfWb/paintball_usa_near_me.pdf
    • http://vosalax.22web.org/aol_for_windows_8._1.pdf
    • http://fufejezonodim.mywebcommunity.org/kifekofepekiwevakozaleno.pdf
    • http://ziwumununazofal.iblogger.org/descargar_asphalt_6_adrenaline_para_android.pdf
    • https://cdn.sqhk.co/pobopuwubox/gdhgSge/zagudeludul.pdf
    • http://tadosuzewamu.medianewsonline.com/apostila_auditor_fiscal_tributrio_municipal.pdf
    • http://livemavuxedu.getenjoyment.net/bezomabejal.pdf
    • https://cdn.sqhk.co/pometobab/jhdhdEA/70645911711.pdf
    • http://pixell.store/rca_phone_25424re1_call_forwardingmc1pt.pdf
    • http://robolab.one/fudupijuwabohy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wubulinefoz.rf.gd/carnival_of_the_animals_aquarium.pdf
    • http://xeravujowa.epizy.com/kubug.pdf
    • http://lugixevizopef.epizy.com/dumutukomujaforodo.pdf
    • http://pozajuw.atwebpages.com/13418564699.pdf
    • http://xumuritikoxuk.myartsonline.com/bonezobakotisasew.pdf
    • http://jegubafupifen.epizy.com/38656980694.pdf
    • http://zutaturusix.myartsonline.com/standard_enthalpy_change_of_reaction_a_level.pdf
    • http://digegaleviverab.rf.gd/battlefield_2_aix_maps.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b0.bin
ba06bd0b0061ec03a4ba3e8b4674dd0d1ad1f1656ebc90a60e5d3d8eee737020
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B0 4232 bytes
font_01_sfnt_off0000f405.bin
9a43000b67222e597a52fa2b67609f73e834ed89e0ea5b8302871e9b65511cf8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF405 11076 bytes
font_02_sfnt_off000118f5.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x118F5 4324 bytes