Malicious PDF — malware analysis report

Static analysis result for SHA-256 99de541d8cc9e0ba…

MALICIOUS

PDF

93.1 KB Created: 2021-07-10 08:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26a4d7986e46747b7815266501ff560c SHA-1: eba82f78b1f111e0f9c5de03d3e96c3fd804f556 SHA-256: 99de541d8cc9e0ba31dc3662317576189a436f61bd3e971eb2d780a13e4e1a0d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and a specific rule for advance-fee scam lures. The document's structure and embedded URLs suggest it is part of a phishing campaign designed to trick users into fraudulent financial schemes. The ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • 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.
  • 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 http://danielbushreunion.com/clients/41596/File/5002606528.pdf
    • https://capitalsyndic.com/userfiles/file/tigadig.pdf
    • http://www.euro-fly.eu/userfiles/files/towudisu.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086583252400---razavanobogazizezedamez.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/3cf754cdfdc3b573e8232fa8b31eda3d/75363651684.pdf
    • https://cgeminfos.ma/upload/file/poximikuzadibojenomes.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad3cdb4889---42063263032.pdf
    • http://ylgems.com/file_media/file_image/file/beguruz.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/b115ttdf2h39dlotulmuccugm4/muwojol.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc5eae5902---bisepepupa.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/277bbffa8e07cc5a1a35ed71fdd68161/fapudowifakutewatatubowux.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/erjb28f7gnbla9r0jj3msfva4n/84543763760.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/7d5b35ca96c00ebf09dfb435a3fd9306/nawofimamitiza.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/3310fd530c49ce3d175f154fd42aaadc/vavadomipowulojete.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b58554130---nowojukuvufokozil.pdf
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/6692913043.pdf
    • http://lobanowscy.pl/userfiles/file/rupuxowosovawem.pdf
    • https://kompaspt1.com/contents//files/91469246455.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607310a9ab2b2---ledazipomipanek.pdf
    • https://kiameds.com/images/upload/files/vuxozagunul.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094211b13fc1---70791994272.pdf
    • http://vizit-k.net/uploads/editor/files/76381732585.pdf
    • http://vladjurnalist.ru/archive/file/4090698343.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba556ac3f61---vunizakokikakosekasedawad.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=they+say+i+say+pdf+chapter+8
    • 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_off0001095f.bin
4fe468976a5e3854b22de0c37c2811e417a0ffe8cc7ba7024bf465b94e805a1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1095F 17224 bytes
font_01_sfnt_off00013654.bin
cce06029d24b985044d36ff9f106e520ecfba139ea9cd43b7fe5a937782be223
pdf-font-stream PDF embedded font (sfnt) at offset 0x13654 10732 bytes
font_02_sfnt_off00014f3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3A 16792 bytes