Malicious PDF — malware analysis report

Static analysis result for SHA-256 f482ad9a87630ec5…

MALICIOUS

PDF

83.9 KB Created: 2021-09-06 07:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1609b5bdf6c78776fc49d171f3ca7845 SHA-1: 0f3fdd6a28c8d809699b1071920dde6e431250c1 SHA-256: f482ad9a87630ec5c899a38c93f37ac3e496af014808bc3b1d9ddafc9c4aef9d
156 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. Several heuristics point to the PDF being a link farm hosted on compromised or disposable domains, suggesting it's used to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

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 http://anhuifan.com/upload_fck/file/2021-5-2/20210502035910959586.pdf In PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/vinowazonuba.pdfIn PDF document text
    • https://baptistfriends.org/media/zizubugagidetapix.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/luxatudujatope.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/41712980732.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/pupafomuf.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/fivixevawamegodewejugan.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/94716823887.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/65243240001.pdfIn PDF document text
    • https://ptogel1.com/contents/files/89648578440.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/kozed.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b435ebe7094---solel.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c8769e70546---fibowuwufapimawedis.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/ngs4tuso043t6q094nacf7bsp2/pewijize.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b5669b097---30796050855.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca676c0243---jufumif.pdfIn PDF document text
    • http://udemadriatic.com/userfiles/files/gazamafifilepis.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/21919945023.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/58030187269.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608499e92920a---46950045269.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071297ce0ff6---jititib.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/99880800790.pdfIn PDF document text
    • http://christopherdallo.com/file/gudigozagesedezexa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=leukemia+pdf+2018PDF 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_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 16880 bytes
SHA-256: a4239fc8796906ddca4c0e632150baf1e732a276e106ca3a39c1f762edf080a4
font_02_sfnt_off0001297e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297E 10676 bytes
SHA-256: 2c5d1ad7c3755a36681111526d22fcd57c932ca55b8d6cc0051156260b9a3ba2

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