Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a3519f5a9a42c7…

MALICIOUS

PDF

116.3 KB Created: 2021-06-27 23:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8d5f4b017e41acf80d0e9d9f92913be SHA-1: 1e12d1dd6b84d1a025bf81d0df6f909a1f501248 SHA-256: 47a3519f5a9a42c750d4da9c665abe07eb2d2e8a6c6b1449ed2f2b5a1dc8710a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of embedded URLs suggests an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

Heuristics 7

  • 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.
  • 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://auto-spec.ca/fck/file/71662750540.pdf
    • http://yasaitogo.com/uploads/files/fojarajokakobabu.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/6427e4d4d4815bf09e67fb29b015c3f6/zatenufadujugamakejifowu.pdf
    • http://osoboebludo.com/ckfinder/userfiles/files/31571139583.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaae9f75aeb---mirinazez.pdf
    • https://alshamiltrading.com/alshamilfiles/file/51327440284.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/a6176152ba8370af0124a6824165c710/kopiperunilenid.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2a11038b82217b9322c077f1582bf3a8/simipimiberi.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/9p80tfnut6bsnfn8grk4o2b07o/detiguwuvilijopomatonem.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c727cc03b3---nudajajoketugosolaxuj.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/1dc2e48aa389eeb22bfd666aec94db0a/38341878404.pdf
    • https://uniontend.com/userfiles/files/26995447216.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d998cfcfe---35844183437.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/j6m162cpps0nfpdu5nsacbi87g/tominojulo.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/062526ad78c8df33328a9b76a471f7de/25472001260.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/rja7jpevretekd489bpu2pohk0/bulekimatazivijamajawelu.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/g7vgtj0128n2l5t2a5lmni5g1b/voforufudeluri.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/n44j8vuc9mu58gbicr9s8cfsf3/sixixi.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/389f115ec1dc79e1a8cd6fd7fae6378e/pateveruz.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f62b98aa134ea3f103718a0767861ced/55731191910.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0494b11e3a---99572458177.pdf
    • https://superchills.com/userfiles/file/lezimigo.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/vcmefbahg71uvbsgqdpjtdhgb0/31227720742.pdf
    • https://addsfly.com/userfiles/file/22659750585.pdf
    • http://lycee-elm.org/userfiles/file/56033053036.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098b42aed23b---59833927593.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=adult+attachment+scale
    • 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_off0001667c.bin
709358e68cd35cb0cdeff2bfd23de43caa2ffdf154bd12ca809a54f71e49a8dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1667C 17608 bytes
font_01_sfnt_off00019496.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19496 16792 bytes
font_02_sfnt_off0001acad.bin
9450a0a6a9cfce38cad4183d6c2b0162db82f740fcdf02aca0ccd231555d7549
pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACAD 10404 bytes