Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f354463b5826e2…

MALICIOUS

PDF

76.2 KB Created: 2021-09-19 08:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0cf0697c0bc1619be3cf31510c4b9e4 SHA-1: 87c3b0d157277d277617cc328583c266163cf413 SHA-256: 71f354463b5826e2284a000f68dfdf37f53d8c3fc202a25819b7e27d0e10282b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is designed to trick users into believing they are receiving a prize or parcel, a common tactic for advance-fee fraud. The presence of embedded JavaScript, identified by the 'PDF_JS' heuristic, suggests the potential for further malicious actions, such as downloading additional payloads or exploiting vulnerabilities. The document also contains numerous links to external PDFs hosted on various domains, some of which are identified as compromised WordPress upload storage, indicating a link farm used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • 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.
  • 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://intekcanada.com/ckfinder/userfiles/files/romekobemaloseju.pdf
    • http://futuralagoparking.eu/userfiles/files/riwinokitilokijewajiku.pdf
    • http://christopherspubandgrille.com/userfiles/files/kimapup.pdf
    • https://nenmongdangquang.com/upload/files/53187266121.pdf
    • http://metallpress.ru/files/xuzukat.pdf
    • https://evrenmentese.com/upload/ckfinder/files/rorimazegixa.pdf
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/sakazifaronaginoj.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161393c4bab58f---77646390109.pdf
    • https://dbhattacharjee.com/ckfinder/userfiles/files/poruzanexorujoxeja.pdf
    • http://www.mousumibanerjee.com/fckimages/file/9308027001.pdf
    • https://rusepress.com/uploads/wysiwyg/files/5251807571.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f789fa049f---47256030895.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f17d62d110---dukez.pdf
    • http://pelejas.com/IMAGENS/CKFINDER/files/69116486786.pdf
    • http://garagehayashi.com/js/upload/files/71720688196.pdf
    • http://www.anclupnapoli.it/userfiles/file/72816626540.pdf
    • https://drinkpoint.com/uploads/files/84488668047.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16141a0b2e0793---28955100241.pdf
    • http://criollo-cocoa.com/userfiles/file/27649838457.pdf
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/fegoxel.pdf
    • http://swatimishra.in/uploaded_files/userfiles/files/bimedodonosovaxibofara.pdf
    • https://zoldlaptop.hu/ckfinder/userfiles/files/11833542366.pdf
    • https://hbphoto.ca/resimler/files/zukiwedefo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=live+cricket+online+score
    • 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_off0000c699.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC699 16792 bytes
font_01_sfnt_off0000deab.bin
aa2e34e3a88e8cf163eaf1dd549413cf14218b792412648abb7b046deacabd8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 17396 bytes
font_02_sfnt_off00010c13.bin
82f23cf380b103dcf12df36e54ecdd84581bb588e89dd5f0ea9dd72ac29a8ed2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C13 10176 bytes