Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cf532550ba7591…

MALICIOUS

PDF

85.6 KB Created: 2021-06-26 23:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce31b99999237b7f7e19653e7f38e33e SHA-1: 362e24bca3cc3f3a6dbdfb9dac78795b8a50c84c SHA-256: d0cf532550ba7591b0cacfab89105e600570a7405c5ab162abf00598cdd5e6df
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 phishing or malicious content delivery attempt. It contains a link farm pointing to multiple compromised websites, likely designed to host or redirect to malicious payloads. The presence of external URIs and link farms suggests an attempt to distribute malware or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://micast.de/wp-content/plugins/super-forms/uploads/php/files/2rlfeveaj4g737qukjmh6g1qtg/tavipuvikunakabax.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/v016976umfn0sjikhr83upv1e1/52064360130.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ff3988771---26991950861.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a19730562c2---71787301371.pdf
    • https://bnbcostaverde.it/userfiles/file/55508044839.pdf
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/30864830689.pdf
    • http://progfin.pl/userfiles/file/29094772956.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/p5gqrehspildbgifdbe3hd7da4/zebilikiwuligavuzagopo.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/54afd776c440e3740c2a73555aba6195/puvef.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/pnq7rret1kg0q7br1pggthorm7/61376465241.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/68fa4df57d6a980af89e8c922d8c1d0b/73540907876.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081115c72989---torojelat.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/44ipa5ov8vp8c4peq6eokgigo5/55163307417.pdf
    • http://verduciautodemolizioni.it/userfiles/file/benelovejej.pdf
    • https://rent-1.es/ckfinder/userfiles/files/dolowigixizonibipomom.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/a277198d580a1fea87eccd6806a0518f/ronuvomesilitok.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/d8b1593a358f46701b4e812f3d24b4f0/63409505372.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k2ono5l0lonvdh4cbaiecatrq5/71010955213.pdf
    • http://vce34.ru/attachments/file/tudazawamo.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/3e38afe6c5604137abb2f1325c0a8d61/koluweleribusuferegi.pdf
    • http://zonazero.es/userfiles/file/dutakuluk.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b197b5fe43---19414708869.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-6-5/20210605194529259408.pdf
    • http://gongotour.com/FileData/ckfinder/files/20210610_C0D3CF87BADC081D.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+age+of+absolutism
    • 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_off0000eab7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 16792 bytes
font_01_sfnt_off000102ce.bin
2f00afe3e35c3afe1cc2159daf60c5a72db7d18267e40df52179b1c84994beda
pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 10660 bytes
font_02_sfnt_off00011b3a.bin
1b17c3e51a53e3497d65512b199dd62bb767765c10b287dea128efcc243f326c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3A 17332 bytes