Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1c113403958e4d…

MALICIOUS

PDF

130.7 KB Created: 2021-07-06 17:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d413756234a2e87a36d7dc312051faa0 SHA-1: 39d5c15bda8933daa2ccd663efcd8a7ca63c1074 SHA-256: 0e1c113403958e4d6ff251a669d33d47a9e3bde925f570fd22c0335ed9bb6e2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. No scripts were extracted, but the structure suggests it's designed to lure users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9631

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://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/40kbph5kps3qu5uvb2li0th5n6/74087826001.pdf In PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/410b1f2e819a47573585ca698aa4b623/26478324588.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/42996159571.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/917b279151c048510246c9f730e1ad71/43618754423.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/05b169bebcfd53c5961adaee63b600c8/54222346603.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16090dc91ee803---67660231106.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/135809322e01cbf2c1a02d911380a375/58031555925.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b21e2b12835---nonudew.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073615c1c082---15451499956.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/3de1c6bb848540155d881c75d0d20991/xegupene.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/eaab28eec46fd67d6688b5c92389bf21/33846710767.pdfIn PDF document text
    • http://kbchina.de/upload/68620380815.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/8584967118.pdfIn PDF document text
    • https://memoservicesrl.it/file/desiwisivariwoj.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efff7964d2---36715407135.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607876912cebf---66354881316.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/wonoxikofukodemav.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9553479a76---35999990513.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/e383ce119d4a229c4b788b69111ea492/wesosewidixazozisorilo.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/78941071157.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/17511037078.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf5152b9a---pimuredawofaxilutexase.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/acedd7fb090e6352ec4ea49cb12a27dc/nirasoxakurateduxutawe.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/38af0f0776fb87a9383f4a35a184c931/napopit.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/98132892672.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26d2c35577---98819227166.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=countries+to+scale+mapPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ED1 16168 bytes
SHA-256: 34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29
font_01_sfnt_off00019468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19468 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ac7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC7F 10668 bytes
SHA-256: b3af9f11959b59296f5d19be1df667c65d7b75163aee75ffb89bcff1e1dd62c6
font_03_sfnt_off0001c4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4F8 20796 bytes
SHA-256: 3fa693862bece7cd1504856c646a90522fbeff6b5ba3b2f5e18cd28b55306d00

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