Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf11e02c5c716b1…

MALICIOUS

PDF

84.5 KB Created: 2021-09-09 23:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30129c892b1a72a43402d5b5316835bb SHA-1: b1ef557b3b1d3d3ba01936dee979a456bb7fb2f1 SHA-256: ddf11e02c5c716b1f2d3af231264347eaa339a824a8b7c08e148ce536ed5c43c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically related to phishing. It contains a large number of embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary function seems to be acting as a link farm to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://cructi.ru/uplcv?utm_term=ff+tactics+ending
    • https://angem.fr/userfiles/file/3610827444.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139c082b12db---32959753177.pdf
    • https://pinyardim.com/calisma2/files/uploads/liwodadoninodevoj.pdf
    • http://vino-charlie.cz/userfiles/file/40267726570.pdf
    • http://mazraeir.com/images/upload/files/36659893812.pdf
    • http://tiga.co.th/ckfinder/userfiles/files/bigipovolo.pdf
    • http://nutranghongngoc.com/media/ftp/file/vubata.pdf
    • http://theponghop.com/upload/files/xonigumo.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe2a5a7aea---52434021931.pdf
    • https://bfull.ru/uploads/files/judavepude.pdf
    • http://gelinyuanyi.com/upload_fck/file/2021-9-4/20210904024311292119.pdf
    • https://vildmarksjagt.dk/userfiles/file/fotevononafagerulopu.pdf
    • http://cathugo-catamarans.de/res/wysiwyg/file/76405773934.pdf
    • http://sutipatika.hu/userfiles/files/44359186633.pdf
    • https://latrinquette.com/upload/editor/file/wutinideroxasowekiwewewa.pdf
    • http://vilniausgreziniai.lt/userfiles/file/sesenirefinexop.pdf
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rasus.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/ab5def80ee0a933c91235b44dbd0c1c5/87495466052.pdf
    • http://tramtronbetong.com/uploads/userfiles/file/gujuwoxafofediwed.pdf
    • http://barudan.hk/UploadFile/file/20210908195135962.pdf
    • http://ekstelekom.com/userfiles/file/34417694603.pdf
    • https://lekkermooi.nl/userfiles/file/makol.pdf
    • https://contabil-fiscal.ro/mm/file/61998781473.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_off0000e5a3.bin
43ca12f85b3cd672bee31ec0c237c871514805a9be18b79fea03583fb2ddc79e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 18072 bytes
font_01_sfnt_off00011536.bin
7f2768a984ff782bf57283b31c6571dbc8291bc685d830f6a0d051c4b4f0636e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11536 10360 bytes
font_02_sfnt_off00012c87.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 16792 bytes

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