Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f6d1ab6aefe6e4…

MALICIOUS

PDF

97.9 KB Created: 2021-10-07 00:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9179246116ddd55da894b2b59f186314 SHA-1: a7703b05ea6022863c090d82119ff70645e09291 SHA-256: f1f6d1ab6aefe6e4c754b38a0550b1244d0f3b507239bcd826c1ed30f3b07b39
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting it's designed to redirect users to potentially harmful content. The presence of multiple PDF-specific heuristics further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=content+and+pedagogy+of+physical+science PDF link annotation
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c2337657ca---74752571957.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/99795653982.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/xexerujud.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/notawexoxipot.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/wujoremenovonobop.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/rufemepuzeguniteg.pdfIn PDF document text
    • https://olterus.org/contents/files/10311578140.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/32055482391.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/76272983581.pdfIn PDF document text
    • http://glttek.com/userfiles/file/rokinigokegowazesenari.pdfIn PDF document text
    • https://mkontroll.hu/File/wewapukajutuxujukiv.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/88768734038.pdfIn PDF document text
    • http://xn--c1ajalgzu0a.xn--p1ai/userfiles/file/rikikofutozejuxerutukima.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/pavarilaleguvazukajiginos.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/nowetebupewivug.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/8711750436.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/zogibexobogopirupek.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/3057290766.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/murefekobususu.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210908071020525126j17g7nby98ul.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/kefosuzofopezaro.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_off000111b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000129cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CC 10944 bytes
SHA-256: 8f3e44a16c47acd587acb8c2b02a4d0a27a3e5ce2861b016108ab0263984e109
font_02_sfnt_off000142f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F8 21044 bytes
SHA-256: b3051e411fd7f729f19bf589e1766909421089711145911719109ba05518c70c

Open this report in the interactive analyzer, or submit your own file for analysis.