Malicious PDF — malware analysis report

Static analysis result for SHA-256 48af7f678cdd39e7…

MALICIOUS

PDF

86.6 KB Created: 2021-06-27 19:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cba5607021eac30b3f4a9cdaa0754bf SHA-1: 52011c266c62af13b7d5136bc0686bf9d1b81500 SHA-256: 48af7f678cdd39e7b14aa08f31d655e8037b4cd6b9a2f13e4df0e3358988d822
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans before delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084c1b4c1472---30340070461.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fc01b9256---fopanefuxemewotumuv.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38cef8a471---20625215715.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861b554397e---67153088960.pdf
    • https://ludifrance.fr/userfiles/file/sirol.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b304da91cf7---76914394809.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/46d7b7b2c7d8886a4e0cafc9159478cf/pawifabexuvobapizugolula.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079174729d8d---xatifutoliv.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/a2174e1a157a721ce4a80aa1fffee981/galiwiwojumi.pdf
    • https://educhina.mn/editor/files/jajiminivovafujixuwiza.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/bkp5ml2mt03mssteljhcuvjn22/17261641229.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/7e3b81d97d4dd22ef25647028af35acc/65550834245.pdf
    • http://pwr-tech.ru/userfiles/file/75668672936.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609232e7857aa---61418445095.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd63d2c0ee---mubepa.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/60620c35185003d77841f20f2e58d6af/lefulewovugimiva.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727ad4a9ae3---wudekuxolazopizuvomu.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16089ff063500f---wesejixafasa.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/dd841b69045796b3e53afaea039c319f/dawinidoz.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608620a04120b---66700082765.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/150817024e1ba2f17edd4c5176e42596/27792084466.pdf
    • https://ascinfratech.com/clientprojects/trading/file/guxekobifuwukitarenoxapi.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/k1ic5ork0jcomf18mrgolblj77/27166424706.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac602b7ae29---sejefadamurabuxi.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4dc2c1bec6fec1588e65843854a1ecd5/38684683235.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=tab+divider+template+free
    • 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_off0000ed94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED94 16792 bytes
font_01_sfnt_off000105a6.bin
732cba3cb46b9a051dac0a047284a1e5fe817258ed416be2b851d6f49b671ae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x105A6 17648 bytes
font_02_sfnt_off000133f2.bin
805b5cd054b105ee6c8a6d3531f51f5c9f28b9c63c77733b054e51c1ad046f96
pdf-font-stream PDF embedded font (sfnt) at offset 0x133F2 10436 bytes