Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5595188c295796b…

MALICIOUS

PDF

75.5 KB Created: 2021-07-03 03:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e503d13e37a9e79b4718bb44a6e26c56 SHA-1: 2aacb0d3719e203a9769f0a5d5975d522d8fb1bc SHA-256: f5595188c295796b7c9d21359895455606e1b8b5225679894ede0bd66c116bab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple URLs pointing to compromised CMS upload directories suggests a link farm designed to distribute malicious content or lead users to phishing sites. While no scripts were extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097d62260ad4---36722440843.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1568a5d24---90603582804.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/n722qpom3ls1ch46luivcmr1a3/panurukazije.pdf
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/rcupp2qdrg7dl3ptuplbdl1db4/gamoseki.pdf
    • https://floridainvestment.cz/files/file/26479898159.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8123ad4ee4---zejukawanoxipumapuwaxizu.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f805164615---gununekibigu.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/7028corkdrvbv57mkdhjdif4jg/34246555740.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c2af72907---ziguzakataxugawubo.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed4ccd9cf5---lenaridipug.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce5cbf413f---wokarovaropox.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/0p2vkje61j7m5sv5e1s3kv37v6/jifidirusaxebumex.pdf
    • https://partnermind.cz/images/files/ledojobexigawuxepekaluj.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/932b09019f38fb78427e5439dcee9f21/rovebix.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a49065e8809---novibura.pdf
    • https://parklanehotel.asia/userfiles/file/60695751244.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a402c2e3b---ganumanen.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075a51690523---rovapisitu.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b6b9e2850---vusegiravu.pdf
    • http://artospace.com/pics/file/3560997893.pdf
    • http://tikatalog.sk/_files/file/tegiforoxatejowak.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/79a2a44ad5a5647b65a3004355a9e685/lelovetiwasopip.pdf
    • http://stardentalcare.org/userfiles/file/28362918167.pdf
    • https://miaousland.fr/ckfinder/userfiles/files/gunimowalu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=percy+jackson+and+the+lightning+thief+free+full+movie
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c163.bin
6ffdf116d639f9d9be6f4eb44c2ce25283824ee621bad059243ddc87c28c201f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC163 11424 bytes
font_01_sfnt_off0000dbf7.bin
1eeee1e97ac779c54a4115af19a9035e949991fc93274210d590f1913bbd6f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 16960 bytes
font_02_sfnt_off0001080b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1080B 16792 bytes

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