Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ac430b936c561a…

MALICIOUS

PDF

105.7 KB Created: 2021-06-28 15:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a02ee6f24972bc54f29403a60d543e49 SHA-1: c539b3d7ea99fb80ff0bbe4481d4538a05004a41 SHA-256: 79ac430b936c561a4a8407da6dae682cf35ca462870830ab7ecfcc40b46acd9c
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and is flagged by multiple heuristics as malicious, including a specific detection for advance-fee scam lures. The document's structure and embedded links suggest it is designed to trick users into downloading further malicious content, likely by impersonating a legitimate notification or prize. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 9

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://arvikabc.com/images/uploadedimages/file/86217421900.pdf
    • http://veivel.com/userfiles/file/basagamewejokawinilifozi.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/d4faabddf5607ad44a6f3c0c40c18805/rolivenojizuzunesepapir.pdf
    • http://sosnovgeo.ru/userfiles/file/zetotajulagotavawuzep.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/4a7d1e0c4c3651e085fb7f07e6a842b5/34755636175.pdf
    • https://ntwbearing.com/UserFiles/File/tumadizupamemozi.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608311b18cd65---28552740783.pdf
    • http://austria-ex.com/images/blog//file/85191169458.pdf
    • https://discovercefalu.it/_data/images/file/74671984499.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/hisuiuusus7hq62j86v7c076eu/60551280447.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/a2c03b1c22c51ff694a39cf4d95421d9/43384161136.pdf
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/fozodimenakalanuxizakita.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/hvpehrarlifhn4unoitjln678q/94536450619.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/19f6b0b1b345e58e495e7ae9f17d00ea/rixasowufijexalonolekik.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/18jhav8bk2qbccr01n9uecboe4/nilatimuminuvowopos.pdf
    • http://reutlinger.pl/userfiles/file/11845791448.pdf
    • http://ahchala.com/img/file/fetinimafafutoworo.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/jto3ak3i1c8qkalof8vjrd5du1/tejoganuxajafonusikoxukod.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832b48451f8---bezuzomagozuru.pdf
    • https://octvads.site/js/ckfinder/userfiles/files/58389559692.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/bomujozujapak.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160945db0e4636---20620021793.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a37c529ff4a---29590712329.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/jvdmsjfb3reinvoqhcafvfuub9/tejupotepi.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b4d691314---ruradozanajananid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=current+affairs+2020+october+pdf+download
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136fd.bin
4d2babf0c3b8ba8fd8398d6e600ebf63ff4cb904f699697a9005ada60c5f6ed1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136FD 11212 bytes
font_01_sfnt_off0001513a.bin
f8d16844dc5c40f8f0a5bda1876b24b3aa7e2566c02650bce62d52826e328048
pdf-font-stream PDF embedded font (sfnt) at offset 0x1513A 17616 bytes
font_02_sfnt_off00017f5c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F5C 16792 bytes