Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4ba8df72f699bc…

MALICIOUS

PDF

64.9 KB Created: 2021-09-28 11:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ec29019ea4e845140bb22456dd95e2df SHA-1: 240568ea074d45470c9aeeaf41a9a7b3a67904ac SHA-256: 2a4ba8df72f699bc369655a72108e641f599ee729dbd7a9b83442ed0ffabc850
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The presence of external URIs suggests an attempt to redirect the user to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5448

Heuristics 4

  • 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
  • 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://mobilpetrol.olajpark.hu/files/files/gufimuvonipa.pdf In PDF document text
    • http://debeight.net/UserFiles/File/fojiv.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/3670362296.pdfIn PDF document text
    • http://ehomerealestate.org/images/file/wakitixitajabororariveg.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/lawozezilapa.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/zefotex.pdfIn PDF document text
    • http://lex.tj/img/file/85747463113.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/setepesevu.pdfIn PDF document text
    • https://absoger.bmv-communication.fr/uploads/files/towuvigazajaxiwana.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/4000066138.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/duluke.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/wanafevotomubumatis.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/73519031772.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/butazevaxigeboxetadafaxu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138768bc9486.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/gesumipufudema.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/632166020.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/45956618357.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615094dcb1ed5---89533891233.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/58262895599.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/40197865194.pdfIn PDF document text
    • https://starfoil-mail.nl/uploads/wysiwyg/jekomujotawesuvoxamuzib.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/66185332268.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=dialer+ios+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF65 10136 bytes
SHA-256: db7db94e12a58c2001c160c4530a8b175c8e4627efba59e7d97ce625ca368eec
font_01_sfnt_off0000c619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC619 17336 bytes
SHA-256: f7580423afd0d9d0e01d3d83327a440c141a6264f4d2f349099bba94866a6c24