Malicious PDF — malware analysis report

Static analysis result for SHA-256 5843fcc902c14bc1…

MALICIOUS

PDF

83.3 KB Created: 2021-09-19 08:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d4dfa38cc441cc8fc8ed811d380cbdf SHA-1: 95b7994c0c2ad6b48f1e36088e8e7d64384e8bae SHA-256: 5843fcc902c14bc10742ec19a3272e434dc50fe877ed4ffe4e3307a843ead32b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are part of a link farm designed to redirect users, with one specific URL containing 'pokemon go mod apk' suggesting a lure for potentially unwanted software or phishing. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://letstravelforacause.com/miet/assets/files/16859220675.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16135c8712fe1d---dodusezojojiwofugavunos.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/3690a89c294f82e2508143237926c054/nelis.pdf
    • http://pasted-radio.de/web/files/gatisaposedelonakuke.pdf
    • http://htygroup.com/upload/files/62489736715.pdf
    • http://veterinariacasettamattei.it/userfiles/files/lusudofelofele.pdf
    • http://kammatrans.com/userfiles/files/worireropiz.pdf
    • https://freebcard.com/ckfinder/userfiles/files/53120740291.pdf
    • http://aybar-gallery.com/userfiles/files/62090055702.pdf
    • https://dacinsara.ro/fckfiles/file/60932026133.pdf
    • https://inprovitmexico.com/ckfinder/userfiles/files/23632117010.pdf
    • http://adas-muko.pl/photo/file/zinutorutib.pdf
    • http://bidmitt.com/img/files/file/46250583434.pdf
    • http://lahma.pl/_u/userfiles/file/91062381295.pdf
    • http://sivam.pl/files/file/39852292602.pdf
    • https://tierlistei.ch/downloads/jagaxaxo.pdf
    • https://edusfera.pl/upload/file/lezetex.pdf
    • http://jezirka-biobazeny.cz/UserFiles/File/58236251084.pdf
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/27104712539.pdf
    • https://m-isc.com/userfiles/file/wexojamevivenarupoj.pdf
    • https://073741256.com/uploads/files/202109110657063002.pdf
    • http://jysfh.com/upload_fck/file/2021-9-14/20210914185025598642.pdf
    • https://tanthueviet.vn/img_data/files/buvonuxisafosonodulitu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=pokemon+go+mod+apk+unlimited+coins+2021
    • 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_off0000d9c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C2 16792 bytes
font_01_sfnt_off0000f1d9.bin
c1d91eb969cb8bf6fb865ea620a03424987f9e4dc208d4670c16d1c136cf6c34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 11244 bytes
font_02_sfnt_off00010c15.bin
5ce569943f086a7ebf7990e5eee5ad1d83a941d4b446f8c0c5903a10c17ab21a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C15 19664 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.