Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ffb945edd39b97…

MALICIOUS

PDF

139.6 KB Created: 2021-10-18 11:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4f89f8ebdbbdc5c2101ca15f80c45c9e SHA-1: f077e0ae070b1d75f9d19c0add75f72f5f88a4d5 SHA-256: 80ffb945edd39b97c5d79ed6c3afea171255704faecb17f2f1187e9c2a7ff0c2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting. The presence of external URIs and link farm heuristics strongly suggests the document's purpose is to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4395

Heuristics 5

  • 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
  • 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://archism.ru/uplcv?utm_term=centralization+and+decentralization+meaning PDF link annotation
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4f2d3639766330460d1fcd8d84ac9b87/90764193418.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/5240947656130f92a30c6c.pdfIn PDF document text
    • https://cakkue.com/contents/files/lebafufilolep.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/nixaget.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/43754709517.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/xopabofinipodedez.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/maditubebejame.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/b70befd8ceb157fa8a229c576fae656a/18873899935.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/47176469581.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/14430090605.pdfIn PDF document text
    • http://qcfloor.com/userfiles/file/19330645158.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109132109325141.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109040359280033.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210925093442.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/2a6bf7721a3aba5da383c34e32899df5/fafewunonapin.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/guzemiluw.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/tidoro.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/sibatotoji.pdfIn PDF document text
    • https://aromamarketing.md/img/files/jitarakajaradekugawar.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1614ea7d43d84d---goxuforibunoduxufe.pdfIn PDF document text
    • https://jobtiara.com/files/files/fedukedinakufezixal.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/30083328306.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/83509352506.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/ruramotoru.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001fb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB11 10636 bytes
SHA-256: d4652f69cb2999b471c918f86c152bfbae5afa4a805c888f76925f951b45d8af

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