Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab419060253991c2…

MALICIOUS

PDF

72.9 KB Created: 2021-09-20 11:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: be24d09223f3a3adea80af4b022c995d SHA-1: 96eee56faf157ab5504ef04f8e728eaa9cbc7a7c SHA-256: ab419060253991c2ef49bc73b27a8a4aa837ce961d7064ed5bb4812487ef7efb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm directing users to numerous external PDF files. While no scripts were extracted, the presence of many external links suggests an intent to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://autohausnschmidt.de/userfiles/file/96870007814.pdf In PDF document text
    • http://salespate.com/userfiles/file/jorewubepunupaba.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/23465597892.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/siwadojolejeronidep.pdfIn PDF document text
    • https://equimat-cheval.fr/file/20440456688.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/34034994226.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f63ff645cc---59731791363.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/vugot.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/42052541386.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/melazifafuxovoji.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee9c1399cb---nakilekigowenomekigopotu.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/zexobejokadubi.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/godol.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/84972116435.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/kigegezimagefubofukaxef.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/20409038470.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/risokeb.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/zeselawigewuxikapajawuna.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/kuropa.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/5858885042.pdfIn PDF document text
    • http://ebus.cn/up_file/file/23013575352.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/6493729630.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=watch+entourage+season+2+putlockersPDF 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_off0000b871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD088 10868 bytes
SHA-256: 8b5e5041ff36e0731a5f524a480ad3336715969fabe09fac32781415efd05a2f
font_02_sfnt_off0000e9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B7 16400 bytes
SHA-256: 1d47aaf0c49da7b41ef1ef25db37beb01ceeabe03223640848a16b9479951c61

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