Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb49efadef88c73…

MALICIOUS

PDF

76.9 KB Created: 2021-06-12 14:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7f8433965cba8ccaa9d7723794ad3b8 SHA-1: 27b750a139beca7dfa6bce64ee679fb5a0cc4e91 SHA-256: edb49efadef88c7337965267babf4d41a09a2ed0fad114dcb313c30461a75b60
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, and parcel delivery to trick users. It contains numerous links pointing to compromised WordPress sites and disposable hosting, likely serving as a distribution point for malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://medvor.ru/uplcv?utm_term=mini+militia+mod+for+ios
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080dd84eb7e0---sukiza.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a37201d4859---sizevexojoxifajosij.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/8f3f06d93c71ba24a02d76a33b1c8331/30248660470.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943b96b644a---vasewamebeletuvu.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b055600c217---65633677355.pdf
    • http://augustaelectricalwork.com/editorData/file/xoxewesebanigebigifi.pdf
    • http://pechati-piter.ru/userfiles/file/wuzisetaxubagixafad.pdf
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/1413104686.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/93ts4cafa4so2vlk7ugv6kf0ah/buzap.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/sdqkno123c68o89ceg9i995se5/tatijabosovuzaxo.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/4vr3vbti16vb4din9194uve07o/fupenutokivogixewopu.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16082c29aa10d9---40873272690.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a62a9209510---jitenitobibokikenokolil.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcc539e833---39093331489.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e059b06abc---68410644535.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6b0b4a5947ca365f9b67b7c150d11b75/fidivofobipibiwasebuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000e719.bin
a86e3b6b8999e717dc27fd7fd26ff17f17b7f158c2cd5d135a75bf748410a643
pdf-font-stream PDF embedded font (sfnt) at offset 0xE719 5056 bytes
font_01_sfnt_off0000f835.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 1800 bytes
font_02_sfnt_off000100c3.bin
13ddb3896bdcc95f1ca53e86742ad10e6acfdafcd7df167a763a85027213c1b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 11020 bytes