Malicious PDF — malware analysis report

Static analysis result for SHA-256 0177ef24295cc8a3…

MALICIOUS

PDF

74.8 KB Created: 2021-07-02 10:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e72f0e1c15173bd0fe522ff80831eb6 SHA-1: 36f2898034c695dbd253243e16fdf3f3ac080c15 SHA-256: 0177ef24295cc8a3e2906dace3dbfcaffa8207aaaa290081a8179f47c0886a22
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised websites, many of which host other PDFs. This suggests a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7611

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
  • 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
  • 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://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075c1ed70610---70679309405.pdf
    • http://liddellgaryfamily.com/clients/863293/File/wedoluxematavovej.pdf
    • http://trendybiz.in/usersfiles/file/12429642114.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/c31bc921981ec7af35ac1c595cc6d73c/32583577430.pdf
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/divig.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/5240108d79ad834d99d944786b5a6f13/zimevidamufozofitu.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/aa62e89d13b346ef5a24717ba376f7ca/10412539928.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609084736e5d3---12342550421.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66872837e9---moligufokup.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/a9db8964818c5b0ff1f07bef4d6d11aa/53595311292.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094df7021b11---lotazanolevimoreton.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/da0a56c22dbd08c96d535eb8ff3f3162/ruzuramuwedetizobixamo.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8e9610a28026514b8abb21709809abd/lezokawupefumaxorogawan.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/6e170f0be440b2fe05b9c854576c7fc6/18209459347.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e613088251---89967356801.pdf
    • https://rubin2000-distribuitorshop.ro/userfiles/file/kapepajakovi.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed62aec1cb---domamamigin.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800d15c409e---98739927951.pdf
    • https://ludifrance.fr/userfiles/file/nerowosepizif.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/n7m80eaasf9a9o0ufn0rhejlps/zelatemesefar.pdf
    • http://beijingxinzhi.com/userfiles/file/20210616124323_1796664102.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071f64a767c9---gotawupamijefulonovafaj.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835015e3ec9---pejofesaxigowisapi.pdf
    • http://melly-incendie.fr/img_db/113089430.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=visual+trivia+questions+and+answers
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DF 16792 bytes
font_01_sfnt_off000100f1.bin
cfd3c8c304c74686f886310f9e831d6e9c1f84afa0bc68e02341d2f341dd1d7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x100F1 17700 bytes