Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca2f648c4fc21b0…

MALICIOUS

PDF

95.6 KB Created: 2021-07-17 18:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ca7f3159da09ce149b8e75a518d4e94c SHA-1: cd89b1374b8d7523cc7464c091f2b463d26a48f5 SHA-256: 0ca2f648c4fc21b0ddaeee0fab9ec93b736fdf2128d4262fcd30ee31c7e0b967
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to lead users to malicious content. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly support this. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c150d402467---50958157925.pdf In PDF document text
    • https://jambukuning.com/contents//files/bexedapiwagipugu.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/virakapoto.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/wunimuziv.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c56bfe72c90---temabugipinogo.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606e59114aa64---33851640685.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c3287f3a5---femexepulexavejuzi.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b4b948922---gevevetebuzipavazokipuz.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/19713184419.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739c493e6fb---9212831613.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/i5511klr0tb6508dar71ch4nb1/tozarotudowezazejul.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/tnq1oqf5qng56lbspek8kj2mv3/winuzamugixizoxanulimevew.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/rimodigapivamesafo.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/rfjec0gpaa3pg28qo72qti9ck5/63408776622.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b633b7cf5---34436868445.pdfIn PDF document text
    • https://ludbaegitim.com/calisma2/files/uploads/jumiwidim.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/tuzesusezegamakow.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/jajimudixigisi.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076083a7910c---93500529576.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/dasak.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e70f942f23c---pokufuwenerefomofisi.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160adaf3e9066a---paluseparipubukiwi.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/12246928601.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/makeximevuwuziligomosik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=socratic+dialogue+by+platoPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1ff41ae0aa14011fcea6898ce5432ead/wakuzawarosa.pdfIn PDF document text
    • 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_off00010f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2C 18860 bytes
SHA-256: aa7fd7f5563550ccb2add32a2c15ed8f83ccec0d9f4ce26e6e0620f92b1f88a8
font_01_sfnt_off0001404e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1404E 10844 bytes
SHA-256: e7efdb8c72bcf96772a27c1b618c31cae0e1c97bcbba3ec618bb09fd4c9a9ffe
font_02_sfnt_off00015919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15919 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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