Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02713cb73659819…

MALICIOUS

PDF

80.5 KB Created: 2021-08-02 18:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2adba6a7bc1f8c3add5345ca086f518b SHA-1: b8f818350b6a83de57717e2372fa5c1a64d203c1 SHA-256: f02713cb736598190cfb6012eb35266e7568f0a2a248cf0e7e5466bb0d3065fa
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://aimhc.com/userfiles/file/43861832216.pdf In PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/kazajozujagejurosojesubi.pdfIn PDF document text
    • https://securityguardsupply.net/php/uploads/file/bumuravevikijofit.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/zexirukokixelebaji.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ns8ngvn43ebem5gov1l4424rf3/zapipik.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/ecd3c53ca393497b30cbfbd3530afb82/98785889447.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160befc3fedc86---98606280585.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/92642518601.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/3092415808f8e75d606bd9fdf7979548/duvowozeneto.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/bunigibetijepikazifetagux.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/5e78fc4bc1ab32ddf64bc0921de33fae/rajojenejepokazutedo.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/8884618074.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e337b638a---mudegurujikijeje.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/8b84v0g8pro04c5g7s33ro4e92/82535633470.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e1fb040b8---ruzilimodimab.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/kazixijazunisuzubufixirus.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/30586299862.pdfIn PDF document text
    • http://bogema.by/content/Files/mavitokemek.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/9f2143ef9b53c31ea1ee68f25a1d0357/jenuvenizilibem.pdfIn PDF document text
    • https://tempegaring.com/contents//files/kukoludira.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/vomaxiwexeresikis.pdfIn PDF document text
    • http://soupworld.de/upload/file/suxofusezasonul.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d5057d7ad---72492163972.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f8cd627f9---67731856915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+dupe+axes+lumber+tycoon+2+2020PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 16504 bytes
SHA-256: d2b7ad44e2ed230ae9234ecdb530c6d6f55ac60d5e2bce07bfcd8c6e37853768
font_01_sfnt_off000100eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EB 11360 bytes
SHA-256: 88d845d21641a5f35770d50d459d79d3a1b9692f65a16a504dd92883c19c75ff
font_02_sfnt_off00011b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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