Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ff9459f0467be6…

MALICIOUS

PDF

82.4 KB Created: 2021-09-17 18:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0a3bc4ecd634537bf4b2969917ecc739 SHA-1: 3a4d82c352c757f5e826e4f887b24f21b6317208 SHA-256: 44ff9459f0467be6de1c852362874b81cfd4caf5c69ed1ab8d05c2c8a5728c28
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'SE_QR_LURE' indicates the document may instruct users to scan a QR code, a common tactic in phishing campaigns. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which could be used to facilitate the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://smidgel.ru/uplcv?utm_term=how+to+scan+qr+code+using+whatsapp PDF link annotation
    • https://thehouseproduction.net/file/55286038174.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/36610352825.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/af1b009119fc323921d49512e312beec/53650009596.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/podanuwamomofifigilojali.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/linojoludulegab.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/didepoluwevazefokugi.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/zirimakipugawo.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/49447986452.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/gupilikupogewudinoloxex.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/ropux.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/labimutivosomosoba.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/derubugimisekega.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c7564e710---zimuziwizi.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/lopulebukodafu.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/82731567626.pdfIn PDF document text
    • https://unosms.us/userfiles/file/30815857224.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/tusalo.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/77131591127.pdfIn PDF document text
    • https://zlato-invest.cz/upload/files/18915601413.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/53266719077.pdfIn PDF document text
    • https://ojazzdance.fr/userfiles/file/dipoxewanomifaxuzot.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_off0000dbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE7 17812 bytes
SHA-256: 5b300f3a846ce3306b8d94c510cd3c23ac59202b9c383a938dca7dc884b6f1c4
font_01_sfnt_off00010a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A39 11068 bytes
SHA-256: 26139dbcc233efa400b8b0f2e59bbf159a031061f03b8eb1a414049ac989a3c0
font_02_sfnt_off0001237d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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