Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d911430ca429188…

MALICIOUS

PDF

90.3 KB Created: 2021-07-04 03:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 674a8d6b117a7b009720de38a2b542de SHA-1: abc384f41160b7cdd6896280d65c41b957a861e4 SHA-256: 0d911430ca42918831bef04c52eb74eb385f87cdf4baaa1e307cefd1d1612bc4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, lacking any discernible user-facing text that would indicate a specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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
  • 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 http://haus-st-otmar.ch/userfiles/files/gugujedukezopubijekemik.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608534e63b597---30029987307.pdf
    • http://inwallendorf.de/userfiles/file/tokotosibeseparuxafa.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/e46d239a18b26e462a4d70824f171ad1/vupotaloro.pdf
    • http://futurepoolandspa.com/ckfinder/userfiles/files/wufam.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b56a9a5f8---62832121433.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/7c8fb2a355839573563e232dafe3b26f/47096175543.pdf
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/10575640499.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607401ce791e7---xedutujeva.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/ec54ff2e0b9e616b141f6838f59e0b8e/38460230964.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e8f2f24f5---lazalurafodubidazesozogib.pdf
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/pefijusojewasavasidabux.pdf
    • http://aklond.com/UploadFilesfile///2021051100251944.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/2p9nu1s8k7jnl32pv1j62i7mc7/tadibajedopigiwatimenuj.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe772e7e2b---pafusumojiranexi.pdf
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/94239204556.pdf
    • http://vladjurnalist.ru/archive/file/vikutixivix.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2748324f5bb703812d88628d5d85e6c8/dipetixitup.pdf
    • https://zlato-eu.cz/upload/files/54153558007.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7cb027d3d---vefujatodidutudogogeki.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608647a18c6c2---talanixupotab.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=border+collie+x+poodle+puppies+for+sale
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e9.bin
7bb558c053dc4e043e6ec2b99395c9865f054a5c24d8cc6c1cc1224a35179b35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 16892 bytes
font_01_sfnt_off0000fea8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 16792 bytes
font_02_sfnt_off000116ba.bin
bdc7706160f9d57b5ce3849c09a38adfec7539e90bb46c3c4f5d3585c39bfb3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116BA 16928 bytes
font_03_sfnt_off000142de.bin
477c38a4d2312f42ecb39a68a1c083eb928795ea5cb0424135a39428c9760146		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142DE 10668 bytes

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