Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f67d4f521144bad…

MALICIOUS

PDF

110.4 KB Created: 2021-06-09 12:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c874b4ffe810230b98ef224e2ee0afa0 SHA-1: d75ce37dd8a3fc193b8422aa446b89ccf25800a6 SHA-256: 3f67d4f521144badf74d57c7a395c844804c7c069f96d1d404d701bc17689825
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of an advance-fee scam, presenting a lure related to lottery winnings or parcel delivery. It contains a significant number of external links, many of which are likely part of a link farm designed to improve SEO for scam-related content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or fraudulent websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://medvor.ru/pbw?utm_term=motu+aur+patlu+ki+jodi+motu
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/2674610.pdf
    • https://buvitefano.weebly.com/uploads/1/3/4/1/134131500/2075267.pdf
    • https://mogasijukunuv.weebly.com/uploads/1/3/4/0/134042787/b5ca2f.pdf
    • https://pijafajabivigin.weebly.com/uploads/1/3/4/6/134635516/letebavewumu.pdf
    • https://mugilofovoki.weebly.com/uploads/1/3/4/6/134616553/e7254900.pdf
    • https://derakudo.weebly.com/uploads/1/3/4/2/134266069/8989972.pdf
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/d74e2f50.pdf
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/1701900.pdf
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5fd9657f4f7aa.pdf
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/pokiziluwij_tavabokuzurajo.pdf
    • https://motovatexasej.weebly.com/uploads/1/3/4/9/134900011/vapowem_juribuw_fufuzokeso_vanafarikenul.pdf
    • https://cdn-cms.f-static.net/uploads/4374189/normal_6041630217173.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4695c719-7754-42a4-99b1-718f84f32074/59028951428.pdf
    • https://uploads.strikinglycdn.com/files/81618fd5-f831-473d-9211-19af8fc171f2/what_are_the_advantages_and_disadvantages_of_solar_power_plant.pdf
    • https://uploads.strikinglycdn.com/files/a1572443-ee6b-45d3-8fd4-4b5e759800e0/tabam.pdf
    • https://uploads.strikinglycdn.com/files/b3a363a1-7a1a-4030-bcfa-b2b035a7a7e4/81010920447.pdf
    • http://mamejoniza.pbworks.com/f/game_rpg_offline_mod_apk_android_1.pdf
    • https://uploads.strikinglycdn.com/files/3e63e671-9bad-4b01-b1e6-4c15561f578f/puzelururipat.pdf
    • http://nagaxop.pbworks.com/f/gta_v_rp_download_android.pdf
    • https://uploads.strikinglycdn.com/files/b977d92c-3390-4bf9-ae70-34f5fa553493/how_to_start_yoga_handstand.pdf
    • https://uploads.strikinglycdn.com/files/875e0d0c-7e39-4a35-b993-b69d730b5946/rojurovawetobili.pdf
    • https://uploads.strikinglycdn.com/files/0bb4d2f1-1b93-419b-82a4-82ddaa5f866a/percy_jackson_and_the_olympians_disney_plus_release_date.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_off0001755a.bin
7038549287eefeee75ead08a2802d76d2ddcf2a790218ff4abbf97bb0746be90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1755A 5072 bytes
font_01_sfnt_off00018694.bin
710cb12b8a08eefa0d1e1514016e543f4a93c5c7e7ae62841100903340db9ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18694 11180 bytes

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