Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b29153ece07f877…

MALICIOUS

PDF

67.9 KB Created: 2021-09-16 00:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d13db650a52595aeeaff018265427d02 SHA-1: 903501f55abc0ee28a38b1394700a565922d8b7a SHA-256: 0b29153ece07f8778901f70fa65c616c63db04c117dfa8a8918e771969ead82a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://medvor.ru/uplcv?utm_term=jack+reacher+2+streaming PDF link annotation
    • https://o2opr.co/userfiles/files/laronepemowilunatami.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/12373838084.pdfIn PDF document text
    • http://swissies.lt/ckfinder/userfiles/files/72934886164.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421ed591f5c---27554729379.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/51072470814.pdfIn PDF document text
    • http://touchpanelpro.com/upload/files/40462282471.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/86542329460.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/suzexesozidaxevidivozelo.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210904010645.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f50c75d752---xogederotikafukoxowojuze.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/viluzuberi.pdfIn PDF document text
    • https://ksdc.in/userfiles/file/fodubigazaxegel.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/sulekifipiwawobip.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/2876957011.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gonisifopis.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/51166205415.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/37638095433.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/97117272936.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/lakefererakupekonolileror.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/89083398923.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/lanuwow.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/kaxowofenovenizufijinu.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_off0000ae31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC643 14308 bytes
SHA-256: e469bd6a0705c53d0d1131f3d2ff16771498a09abe5c56bdf89df84310e594ab
font_02_sfnt_off0000e9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D6 10716 bytes
SHA-256: 81ed8d247dc8d6da0db73f537e3845c0b7372c1acb1300f3cd09b9871b69bb55

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