Malicious PDF — malware analysis report

Static analysis result for SHA-256 65cab17be5c282bd…

MALICIOUS

PDF

82.0 KB Created: 2021-09-03 13:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2c2994f3392c7edcf0b8a4a6f7e82c65 SHA-1: d207fa61d88b4b7eeb41bd27f461e5e0d80738a4 SHA-256: 65cab17be5c282bd3abe5b0d49c80eabe2d612793f92930756601b960f3e3c81
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites, suggesting it functions as a lure for phishing or malware distribution. The presence of a callback lure heuristic further supports a phishing or tech-support scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16120254f28b31---pelaruraxuzudulowi.pdf In PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/osl5cv6hidn18436jhgm5kc5is/tiwigefeb.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/tugujirubaduwose.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/86a62b521c30354720cd2fc0676d33ec/33246741601.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47d44dce1d---70799271845.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/d309c570f61580630dbd50ef1beaccc7/vakukibumizipuforelata.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a54db992785---zivupopisadekedikusiput.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49134236472.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/vimazamafisakipeziwarut.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a649ea01dac---36910380242.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/2818208560.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/dixazoxodogu.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/91761542216.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/fuxituzeki.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/250d73dcf99f33d88501bd8ae56f24b9/netas.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5f05c896fb8052aff6632bf5c300e473/99706160968.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071221219aab---67666628793.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/729938b6cbfc331373e145727d85c147/virenudani.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/64421022305.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/fuguwifugiwugobif.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/fadajubomobugomabuweviruv.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609c80bb7ad85---favakuduxurijoraxiwi.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16097317cb0815---giwuzaruxovowagegip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=passive+voice+english+pdfPDF link annotation
    • 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_off0000dc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44A 10768 bytes
SHA-256: 0a198ab6cc91eb0384e00de9428e157b60690a5a350eeefc8f1e320a6feefd2e
font_02_sfnt_off00010cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC5 17852 bytes
SHA-256: a69003d2f14552e310ae074e82b830e7e1253668ff8d91ac62d9cc5b892873e1

Open this report in the interactive analyzer, or submit your own file for analysis.