Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99c2f1c8516815c…

MALICIOUS

PDF

79.8 KB Created: 2021-06-26 10:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7e9f8734d82bd46d60ee5af88f1e0a04 SHA-1: cebdf47cdc26073fef2fc91d4a87e3ffe4eb7cf2 SHA-256: b99c2f1c8516815c847236c3bb89af54014c55a7949fb80c7d2f5b83ce6d0bb9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific intent beyond the observed link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f575e1b53.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/ercfkc5b14qtc83kca64lh3vdc/jiromuwatofifiguzileroj.pdf
    • http://greatnice.club/updatefiles/file/74897253448.pdf
    • http://albino-pitti.com/pub_img/file/42812153733.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606eec8ea857c---ribukemisurod.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ced03464df2---fogaropawu.pdf
    • http://blueyee.com/upload/file/110826329759.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/54f1e21fb13a0da3727136050bc8bed8/86905990052.pdf
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/losuwa.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/cd84d7a59e9a652907a0316c8ff3d433/25769421522.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16086a0b53b070---94881974584.pdf
    • http://creaorganization.com/depo/sayfaresim/file/rosadux.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb21a79b42---denag.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/5902e9fee09c2ecc3a09183d74cbf207/82767205501.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a92f205a8---zanodawuzaberiwevalaloj.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/sqte97nam9cfos6qqfbdhjrr22/zopugusebedoresuzusi.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vpgd7jus5mdcr0gqq67ke15rr2/momaxugilinugefovejor.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b092b8ebe4---81549219739.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/tjfou7fiag3ilmviocatuhm23a/83955287494.pdf
    • http://sclifeguards.com/clients/16854/File/97830378710.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fc85a0145---58729322379.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/qls375hj6obbi8b4api43ujpob/14427962608.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16074c46012860---19544682912.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/8773f51ba92f215228d709c5fbd435c4/37650856249.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/57a1e23a28f0aa60b4e9d678b96ae7d3/zufepuguw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=diary+of+a+wimpy+kid+book+15+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_off0000d294.bin
a0282e18ba2abc141664a80ecc1c16d7e1a9867434c85de1c506a0342ff379e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD294 10728 bytes
font_01_sfnt_off0000eb1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1F 16792 bytes
font_02_sfnt_off00010331.bin
6779b2cb9468beada6da848e314c1c38b845bc5d88ec43555c2b2bb73cbedb3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 17096 bytes

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