Malicious PDF — malware analysis report

Static analysis result for SHA-256 222f8a79f101d1d0…

MALICIOUS

PDF

100.9 KB Created: 2021-06-27 08:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 41f230ede91bea6161de256f6286a162 SHA-1: 679f5d3e3d9463c95c296da449a7c91abda0e8f4 SHA-256: 222f8a79f101d1d0fc3f9f141afea881547aeff19935865550efd76c677d79d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links, many pointing to files hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95', and ML classifiers also flagged it as malicious. The presence of multiple external URIs and the nature of the hosting indicate a potential phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://bestpokeya.com/uploads/files/fuximijuxurinolowi.pdf In PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160791ade4bf0f---7292274161.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a2e8a7349---pezurifivenafowagasoxor.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021062412441073499.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3250c244c---lukiz.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/topadobipumut.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/3808283780.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607525a956781---faxugemiwuwofiw.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16085b2f1e39af---vopinubu.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/4840335747.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/bapuzupa.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/72387532274.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a271c7028f3---58122258593.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/nixixiwidepaxonibojevok.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/afe8118f89b69b22850121f950033e47/xokesevibe.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/8e6c2a104ebf271acde6fa15ec25b407/minebujazilax.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/d7bccd01602d4e705385cd0a8ba228a2/maforezivonemol.pdfIn PDF document text
    • https://isleo.com/i_photos/file/79056571702.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/0ce3b4446ac4cadfdaf69a5926417162/pifamuboti.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/wabuvikuxiwa.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/52821404417.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c56a116fe10---fafus.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5daa010b37---43361196922.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/jepexonil.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f96ec68c1---logeponaribuzifizu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=astra+pro+theme+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001278d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278D 17760 bytes
SHA-256: 462d85954cc4d3b96e769af1c26789644eb0493b29357b888b01bab1690134c5
font_01_sfnt_off00015630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E47 10632 bytes
SHA-256: 05c43162af643c91aeb83a2055e9495323e8114b9a808d305c2ebe6a0593e529