Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d6f0af6d5e6d35…

MALICIOUS

PDF

68.8 KB Created: 2021-09-16 22:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7aae6abcff6c54a3874d6eb2ff048f98 SHA-1: 7e2ebd26dc23ef028716b1b1b888d7399e48c76d SHA-256: e7d6f0af6d5e6d35a899a8042b1be59f289058f8e007fe8302bc6a808ffdc345
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide clickable elements. The document body is heavily obfuscated, but the presence of embedded JavaScript and numerous external URIs suggests an attempt to redirect the user to malicious sites or download further payloads. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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 68 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.
  • 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://infrive.ru/uplcv?utm_term=ableton+for+android+free+download PDF link annotation
    • http://ski-experience-japan.com/images/blog/file/36962478075.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/24786071098.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/76248857676.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/62760767070.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/wimazafafotarafuw.pdfIn PDF document text
    • https://cv-vezouze.fr/media/file/negenixowix.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/47624802280.pdfIn PDF document text
    • http://kahasat.cz/data/file/doxeval.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613998937a749---vonepofopunena.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/xapafexux.pdfIn PDF document text
    • http://benetalent.com/upload/files/lixogowe.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210909171207_58249223.pdfIn PDF document text
    • http://chineseclothingonline.net/File/76544200032.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210906091148.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/6967415745.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/dafutewutifaxigopizi.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/38502480197.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/9587064323.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/gasukufetovexude.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/vasudevobenijije.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/lumafumobolib.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/nozonet.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/87017923561.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/5889960392.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/folaxigigebotedofe.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_off0000b292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB292 14232 bytes
SHA-256: e1e7ad8075f9683b87e064058cf84211171cc5fb9b72f52d8e09cda77fec67da
font_01_sfnt_off0000d58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58A 10384 bytes
SHA-256: 60e2dbf5cec8b6f38a4f7804bef876250397a8bf64795acab881aad4c3f525e8
font_02_sfnt_off0000ed35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1