Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a1a89a36cbf482…

MALICIOUS

PDF

90.8 KB Created: 2021-06-29 06:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fda75f07c61da9b60f749a027f84f324 SHA-1: 9119702c793e22242d021eacfb8fc5b3d6b1e1ae SHA-256: 17a1a89a36cbf4820170cdecc20e94db93ce8e0bee286c90ef643745c4205321
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many pointing to compromised WordPress installations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution through a link farm. The embedded JavaScript may be used to further obfuscate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://imad0c0.com/js/ckfinder/userfiles/files/bitupexofejosexovek.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1970d50f21---14651583225.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/44498a696ea1dd90ebccc06dff54e342/71789270729.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/e3a2697915579ac60e8e8669ce65846f/97847862529.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9471a8b14---11264801181.pdf
    • http://myphamlulanjina.com/upload/files/jojenukozoro.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/5d98d6099de417f69424970834389ea4/11031780076.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08763a4c9---54839649805.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/7fd5c0b0370c49a8545c9623b2f213ec/kulawuvizafamodakatotarek.pdf
    • http://nusratali.com/userfiles/files/faxorasixexubeziwatopeto.pdf
    • http://tumwebthailand.com/ckfinder/userfiles/files/nijoxusasefukelazosuvosej.pdf
    • http://vtaky.sk/media/file/jimufox.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c281d6c3f27---21852541177.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf58f88a3a---27830836331.pdf
    • http://myucmas.com/userfiles/file/zosumajizojijujedika.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609625044d9a5---90694019249.pdf
    • https://hiddencliff.kr/FileData/ckfinder/files/20210611_B01AE6AE4E471B99.pdf
    • https://jamurgoreng.net/contents//files/muruvese.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d3e620abc---42506124547.pdf
    • http://ccspatti.org/userfiles/file/vegarunivuki.pdf
    • http://beerskiboot.com/img/upload/file/fuxogabej.pdf
    • http://location-appartement-venise.com/italie_documents/files/65050033578.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=tcs+hr+interview+questions+and+answers+pdf
    • 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_off0000ff29.bin
5b4838f5cdab4666fc311d753607ef59020c4f5bc933d5fa91f3ff40de79832c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 17320 bytes
font_01_sfnt_off00012c66.bin
c65c2e4d1e55330b0ce390e72263d5e57436b46ad68b761460f0210f728002de
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 11032 bytes
font_02_sfnt_off000145e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145E2 16792 bytes