Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d672bf683ff5bd…

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 00:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7f80749c7b71322850c57c659d4e2814 SHA-1: 369d8d6b7ea67f858dfd24c8a9a3ef438cbef315 SHA-256: 62d672bf683ff5bdbde73623eb52f49c78ac74c536c943fc3168a723664b09d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised websites and disposable hosting, indicating it functions as a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=minutes+to+midnight+trent+parke+pdf PDF link annotation
    • http://boxethai38.comupload/file/bagusosimanemugo.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/t1e35bg5kff65u8koa6nisoa43/zisoliwulape.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/fimurulokolagawesirunusow.pdfIn PDF document text
    • http://asfalon.com/__files/file/35032221450.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/xugewuxuvozizasef.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/80234748260.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/bowakawodokejewubaroreper.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/41207975750.pdfIn PDF document text
    • http://teknis.it/userfiles/files/walojivikimirejafomenap.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a3569bbf7---wilajafegamifutukavilalem.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/fepexevumopode.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160787752b1a31---gotibet.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/48690157922.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/roritixukixegumutagukiro.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/83316390590.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/vafolupejefoxarekuwav.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/67104079203.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/c0bc041d6228f40f972b3473a67bd8e4/befowojufigimiro.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/xirekilizij.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/nurabamamuxonexijoze.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/94355118371.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/99355682478.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/polamepizopomimaz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 18156 bytes
SHA-256: e64587f8f652678475d98c8aca32963b3580a984615ad643411ade5a990740ad
font_01_sfnt_off000108de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DE 11084 bytes
SHA-256: 6b9ab39bebed9163e2fa683ceba63ecc903dc82a088931c7a84efcdd14e1fc0e
font_02_sfnt_off00012250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12250 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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