Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd446f21b94cc418…

MALICIOUS

PDF

103.6 KB Created: 2021-06-29 06:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cfcf820d459004ffdeabc50ecebde953 SHA-1: f0b46ff9452c2ff68bd8663cb6fc235f8efc3fe6 SHA-256: cd446f21b94cc4188c6f1dd12cf71a112dd7b5158f3ae038d1d40216d66ee069
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated maliciousness. It contains numerous links, many pointing to websites with formcraft or super-forms plugins, suggesting a link farm hosted on compromised CMS uploads. The presence of these links and the overall structure indicate an attempt to lure users to malicious content, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6061

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alarrabnews.com/images/content/content/file/volekawumutugodajerij.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f152210a44---34236316149.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/zisafapagesamedalotoweg.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/omr9dejsik8h243tb6ob6mb2on/ruvikaxoteguselorod.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/kimojuwesakotoziva.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160758214d9bbf---kefazujigevotogetake.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/dd78ddebcd001e24868475fa7b4ced0b/finowafujodamakaga.pdf
    • http://retco.ge/ckfinder/userfiles/files/8973056632.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/62p0od5ql5t09i8bloih8f064c/78541065490.pdf
    • http://maciejabramowicz.pl/upload/files/file/3315448748.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cff1169281---tuleneperetuwoga.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1928540f98e59754b884740e6514fb8c/88283588042.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/mnf6tb3f1deap3phutm84vbmq7/duzuvilu.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/694q922nd6dccmhr9c5os5ht25/13618189742.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/5rp2giccqntrfmmp8ae33qrgt0/zamunifumufapowimedin.pdf
    • https://victorybear-info.com/userfiles/files/58494980208.pdf
    • https://festival-bg.com/media/ckuploads/files/larafulegezufejo.pdf
    • https://oncallanatomist.org/ckfinder/userfiles/files/kosugafizolazaw.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607673ee36003---8838641429.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/1mcf9bdkaoecaaha9ueqo6np26/40762267285.pdf
    • https://alixdemassy.fr/userfiles/file/71499853412.pdf
    • http://altaprecision.com/userfiles/file/pekexaloxabakowo.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d751e9dee99---buvilikoremigetat.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/62ce39224354a12a78c447fd1bf37bab/niromukale.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=meaning+for+sufficient
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f9f7.bin
001b0fd2d7cbd2c598a8495bff6c57b6a33c138ea2bdbd983f9d95e360b540d0
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF9F7 29752 bytes
font_01_sfnt_off00012fa8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA8 16792 bytes
font_02_sfnt_off000147bf.bin
a1f27b4e119d25d2e80c26c8ad46c17a3d48104cdc3eb8037bb8e7504ca90c76
pdf-font-stream PDF embedded font (sfnt) at offset 0x147BF 10556 bytes
font_03_sfnt_off00015ff9.bin
c151c7fddf98b23a3697a155cf5926b5270e371c6d66eb5bb5aff84b99a81980
pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF9 26424 bytes