Malicious PDF — malware analysis report

Static analysis result for SHA-256 009f7c72dd81d90a…

MALICIOUS

PDF

77.9 KB Created: 2021-09-02 01:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcbfd928c4e32a8360a7cb85de9b72a1 SHA-1: b9e7d84a0f988259a5532dfa05bec47668576fa4 SHA-256: 009f7c72dd81d90a7af365b2d8e08d068e404a65125ae79838023a923f17ff29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a trojan payload. The presence of embedded URLs and the nature of the links suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=business+plan+for+poultry+farm+in+ghana+pdf
    • http://ampletrekking.com/userfiles/file/losaxirezitoxuwomorikonur.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/onlejrssu2goffg5dvn9fs0i2d/wigorizedomewajebude.pdf
    • http://www.siposferenc.hu/html/zudazonogimak.pdf
    • https://muguet.fr/sites/default/files/file/kurakimopafebuwinoje.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/c07t4fieo9lqfiu72khjfj4611/69254329500.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c5efd741008---denaxasijedujojugowamodu.pdf
    • http://pusheng168.com/uploadfiles/20210710032752.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/02b053f0b15d30d1994fb574d49d2469/23111649380.pdf
    • http://dralituncer.net/userfiles/file/turigabo.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/9e4241f23ae651d103f694809ff14205/35751110346.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c797fdb8354---ripawinefa.pdf
    • http://immobilieninvestors.org/userfiles/file/49211206436.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef3d93d134---13266536634.pdf
    • http://rollfactorytogo.com/uploads/files/37560142803.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/5195830844.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/9on6kq0sc2qbki3p0cb69ovfk3/wesonov.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4e34738c5---16245084933.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/sh2s96c9dj2j1l0nq7jm2nrbt6/89291575011.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/kdaa93mics9651360tr2p3ik9b/paferobenuvalisudix.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b611f97cd1c---38706681325.pdf
    • https://activepymes.com/pub/file/4986907340.pdf
    • http://atenngo.com/admin/sites/site/documents/89648930471.pdf
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/jubebag.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0a48a128b---94397715482.pdf
    • http://studiomalpocher.it/userfiles/files/20072831331.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f24707dd7a---14558213053.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_off0000cc8b.bin
bbac2191cc340a59f6c4c0d3b72565652358b2638eb8486338a35392e8632266
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8B 11212 bytes
font_01_sfnt_off0000e675.bin
66fa87f93b315101ac2ee8d84e94d0e8895bf9253b4a3fd134df163978eb702e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 16760 bytes
font_02_sfnt_off000111d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111D5 16792 bytes