Malicious PDF — malware analysis report

Static analysis result for SHA-256 0569e411fa1b8101…

MALICIOUS

PDF

88.0 KB Created: 2021-09-24 12:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f86c1749eb028c6391182a5a02c458d1 SHA-1: 43ed894931d8f8c57f7d9dace2fe3a7e97104731 SHA-256: 0569e411fa1b81011ca8f8b34594abbff649af3868e6c77d5f16a556acd127fe
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded links pointing to various domains, many of which appear to be compromised or disposable hosting. The primary function seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=geometry+dash+all+unlocked+apk
    • http://luatminhnghia.com/img/files/44090987762.pdf
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/17758998119.pdf
    • http://mmsmarin.com/imgimage/file/31701279313.pdf
    • https://eltechma.com/zdjecia/fck/file/64922540810.pdf
    • http://psychologadamczak.pl/userfiles/file/25953622728.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/e6e9640319ded891dbe75fb786d09fef/povatu.pdf
    • https://seltec.io/images/uploads/files/berikop.pdf
    • http://greenmodels.ru/uploads/files/70746831657.pdf
    • http://ayurveda-shiatsu-nice.com/upload/files/23016490111.pdf
    • http://bensonlandscape.com/editorData/file/5955780483.pdf
    • http://vuoncotichdep.com/upload/files/93274394824.pdf
    • http://travelport.pl/userfiles/file/bosazofejopijoji.pdf
    • http://animationcoach.com/userfiles/file/37238469378.pdf
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/94058596357.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebb9d8fe95---72659217339.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/qskudq6sdkg4aun0al9lb9ndt3/kobomusikudu.pdf
    • http://lab4050.com/upload/editor/file/duxajuxusoxibigumuputa.pdf
    • https://joinvita.com/neu/userfiles/file/87462850312.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135004d6f558---4679051185.pdf
    • http://softwaretesting.kr/club/data/userfiles/file/20210919013534.pdf
    • http://a-pluset.com/userfiles/8322887172.pdf
    • http://stigstudiotecnico.it/userfiles/files/dejidas.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/2f4bae8e8870afc349d6f88be5d4aa4a/rusawixabuxavamuzigafemuz.pdf
    • https://mundolibre.cl/uploads/userfiles/files/dudaj.pdf
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1631377116.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f34a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 16792 bytes
font_01_sfnt_off00010b61.bin
17af419910458d9fec0dc9faa6bfeba5ded8ce300ccec75911f668a9c61b0d6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B61 11032 bytes
font_02_sfnt_off000124f2.bin
ca6df6b67daf0c3413a3a3de52320ada7ae9e205670d27a952e2b0fdbc2249a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x124F2 17452 bytes