Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba219e0550ead2a…

MALICIOUS

PDF

81.4 KB Created: 2021-08-19 10:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 405723b1c03fa7165bb772a4d564325b SHA-1: 796bdb4216fcf96ecf815f35bcc1f5c951bf117b SHA-256: dba219e0550ead2a2de356b6a689302944b0333c8086a6edada4f5d17411c5f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically within form upload directories, suggesting a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with a PDF dropper or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a608a51169e---babiwirowematu.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/f2jq54adsj007n58o46e52j43r/32161134107.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789fca89db3---wefexusozebasuded.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa58f73a304---95643522348.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dde0477d0fc---34940943246.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160809427162bf---gipozilijoverakikiwapapet.pdf
    • http://jshtextile.com/UserFiles/file///72647500019.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/036n6rrmt4v1f2npdmc8g62eno/65221506731.pdf
    • https://fo-prefectures.com/pages/files/mamumosozolagubemivedosum.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a88a27c3f---teziwumuvazajusabu.pdf
    • http://tfh-filter.hu/_user/file/dokolelor.pdf
    • http://cinebuzz.be/uploads/userfiles/files/95469295964.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/dmacjmqdg6lf77b33itl5nob45/piraluzasumewimiruvox.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f133718918---66019589074.pdf
    • http://www.knickmeier.net/images/pageimg/file/bijen.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7152389ed6---bivakiselumiriruvivume.pdf
    • http://capmar.eu/userfiles/file/gipexuwopu.pdf
    • https://coebmsf.com/userfiles/file/842498721.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/b0epd8gc5lurmkp8o53rjp5dn7/83353457053.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbb42e3651---fugaso.pdf
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/xopogobukejanegu.pdf
    • https://camping-du-lac-dijon.com/fichiers/50973060499.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/oqfqov0dm8uif4rigt7a1qvls4/xolijizik.pdf
    • http://www.rify.us/cms-uploads/files/ragaxenelijirabijo.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/de39484edb22a46b7279be0a6d7ccc26/paxapero.pdf
    • http://amsaneeraus.fi/userfiles/files/89944775795.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ejercicios+de+estadistica+3+eso+resueltos+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_off0000d470.bin
baff142975ba7b928a972ca4a4de0f27bd74573502dc7e2c1c05d630afaab8cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xD470 10896 bytes
font_01_sfnt_off0000edc1.bin
1a6f077c05b4fc991482a3ddac2e62bd043ca04f0b1a615fb5c579e1cb592fe9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 18368 bytes
font_02_sfnt_off00011c83.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C83 16792 bytes