Malicious PDF — malware analysis report

Static analysis result for SHA-256 179187ded3d5c269…

MALICIOUS

PDF

81.0 KB Created: 2021-09-12 03:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 89689b2cd645588ce64a8ae8d64e8799 SHA-1: f1dd062cc7fe5ff509c72eb381b27268a2e4551c SHA-256: 179187ded3d5c26966cdad7897482033f8f8ada7abefe35b13d028283f3a58de
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing sites or download further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to obscure the true destination through a network of disposable links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://archpiudue.com/userfiles/files/zababemiloj.pdf In PDF document text
    • https://alrukn.co/userfiles/files/gidumegekebodabuj.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202109120652358553.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/45989731213.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/zexedapup.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/rofapovanukajazasobotiki.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210902_195458.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb7277a2cd---nedoso.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/64323783253.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202109020206253010.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/42297659300.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/5873596250.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/83573963656.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/sibavogerigafunijirefazu.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/87926804502.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/gowuwofivefetisu.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/bedubikinaboxulutil.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/44018432909.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/saxugexovifakifimafu.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161356b1ea60db---fumasukimovixewuxezega.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/rujakelozi.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/37378888803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=emily+dickinson+themesPDF 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_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF162 17724 bytes
SHA-256: 291cdc4dbca93b022a228ac299005d33f88a7beed2a959cfbca96eac9f65b13c
font_02_sfnt_off00011f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F00 10564 bytes
SHA-256: 6e1f599b02172f7865b65b78a56c6b7d34d6e0bf04ba2bdbf1fae960ba3ff4eb

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