Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b79593ce74aa15…

MALICIOUS

PDF

73.5 KB Created: 2021-09-10 05:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9256cf22c78022bc50e392d2f80ca617 SHA-1: ba98e1c267408d018979f1d2c36c124e4f8ac658 SHA-256: a7b79593ce74aa15399301c55c40d11dbb99769c072bbe1081359fd230fe6c94
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. The presence of numerous external URIs, many pointing to disposable domains, further suggests a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7907

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://yesilkoyluleriz.biz/resimler/files/gukonejibefot.pdf In PDF document text
    • https://salonrewards.ca/images/file/kuwujukomifekigaximomu.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/xumiputufoxaxoburifiwoxaz.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/patamirejimu.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/30477632212.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/dajuputujamudetebe.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/81719266636.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/wumizakipodatijavasorumur.pdfIn PDF document text
    • https://mimzyonline.com/userfiles/file/xisivufozujovipejataw.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/97346503751.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/38708512731.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/gasemotaxi.pdfIn PDF document text
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/51427360860.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/runebezokagagotoba.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/45869891595.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/petavirigusiwowujonida.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/4598362451.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/ranonimepegit.pdfIn PDF document text
    • http://usmleworkout.com/files/file/xasefetemonuvug.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613017db82db4---gudixivagupinimoxibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=iphone+se+2020+vs+samsung+note+10+litePDF 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_off0000d4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB5 16964 bytes
SHA-256: 20403b4c3dceae5e4c069381976ac6453f81da8a0f43bd7111b8c3baf5be66e0

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