Malicious PDF — malware analysis report

Static analysis result for SHA-256 6852540231fd0eb6…

MALICIOUS

PDF

67.7 KB Created: 2021-10-08 04:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01b923189f6c54699656859d9a112f2d SHA-1: 4d816d3a48eaf7d4dcac73b0860c45946302722a SHA-256: 6852540231fd0eb684259bb7c4b20a203bdc1cbc28738d5bc2a3e3f3dd12b07b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only content and a click-outward action, typical of scams. Heuristics indicate it's a link farm on disposable hosting, aiming to redirect users. While no scripts were explicitly extracted, the PDF structure and malicious classification suggest it likely contains embedded JavaScript to facilitate the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://decaldankinh.net/upload/files/zanomitomijipexopoz.pdf In PDF document text
    • https://expomediainc.com/upload/file/3759972162.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161471cbd77394---fegexu.pdfIn PDF document text
    • https://garmin10.ddbseven.cl/userfiles/file/nimitaxibufarorunabalape.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/10769879924.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/47219988747.pdfIn PDF document text
    • https://activepymes.com/pub/file/tibezavupalez.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/35700372376.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/dawibamaveponakivelonu.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/ludol.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/xurujuzepujepofifedug.pdfIn PDF document text
    • https://v-rshine.com/upload/images/files/97375665794.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/51656311642.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/5009063505.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/zumuwelenefifupenuset.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/pisumode.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/sezevixodidifovinezoduf.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/dedegezariwatoponokuxejif.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161304f75d2b81---vajufan.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/busulujenolorefeji.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/sejorelirejegezosiw.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/59015728003.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/35815742376.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=forest+city+iaPDF link annotation
    • 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_off0000b082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB082 13968 bytes
SHA-256: 6a029c72f03d12d4f6ee638b92e104438ba264d7133d73738e05befa9db8c4d4
font_01_sfnt_off0000d278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD278 10164 bytes
SHA-256: 509d63b4d67ca1a73f4256cd13f3f93baca96099047044bf6589fa340d6245a0
font_02_sfnt_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1