Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3be355de39db35f…

MALICIOUS

PDF

88.4 KB Created: 2021-06-25 23:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a2a1164e41c6fed7c7eb06315a5eb09 SHA-1: a85fdf9af6223b065535cfb719ad1fb36e650bbe SHA-256: e3be355de39db35f38269fcbd59be540da33736c06e16bd9cfdc4275b962416d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate it's intended to trick users into believing they are receiving a prize or parcel, leading them to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=cities+and+the+health+of+the+public+pdf
    • https://euroroma-bg.org/files/file/giridakurumudulanifupifus.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae28a72701---12043543527.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/ldvr7pabaec9b477rcsokv1966/medulusewaxowetos.pdf
    • http://www.hgbehringer.de/img/files/files/lanorudulevudadaverifo.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/1ln3lvmj62l8d704gcarochdmi/45213100035.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/a045cd530d53eb9e47d79d92341d3dc5/pagejubixelulujal.pdf
    • http://barbusci.it/maisUserFile/file/75933452791.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a111d46a25---kuluv.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160746bfc67ed6---32458387359.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/adbade6f33d1460bf5ebb13536d6985e/26121250610.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22ad2cece9---44141707750.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d137d05ba---jidijavokakene.pdf
    • https://aartipalette.com/userfiles/file/96072432449.pdf
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/2375443920.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/c8fjth758u65nfaeu0bm2sqii2/72461531220.pdf
    • https://faresaldabbous.com/uploads/files/rotudimaxavuwofuxigulu.pdf
    • https://chptravel.ir/data/file/76624308700.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/d0aeb3bc50d912ce58e3c4c9dc49c3c7/97411165889.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/c562b26a435db83c5a959caeadf7d402/robokuloluzep.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d571bdc9f5---12844995483.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c456e88539---mutusada.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607848371bbaf---83326667684.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072beac462b3---wenedivajosugajo.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://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_off0000f36f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF36F 16792 bytes
font_01_sfnt_off00010b81.bin
ed86e6f02af12c354b7992856fd03d1354952d6e1e91256f3484f1abc5f3ac13
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B81 17792 bytes
font_02_sfnt_off000139e8.bin
422481f384dc64a28beee7180942fcfb498223adc47f39bb8e330ddbc421a8cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x139E8 10888 bytes