Malicious PDF — malware analysis report

Static analysis result for SHA-256 2953cd517fd69cf6…

MALICIOUS

PDF

88.4 KB Created: 2021-06-25 21:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f04d7d6babf4d4670f1e768460eba204 SHA-1: ccadcaa4686e0b3ea2d597e032e756b5066209ed SHA-256: 2953cd517fd69cf62fcead7bdaa5a35a287c2195569481799a1544dc2a660229
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of these links and the nature of the hosting indicate an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d53ef30735---1295023741.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/j7ik3mjgg4d9fvl8uopq653t61/dapet.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a45bafc39ef---duxelarizutuzivife.pdf
    • http://soflocops.com/clients/67403/File/29275588742.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/op3benlj3rdmbagijhomuv44nn/xunuloxezumubupepulujon.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47a1482a90---41065873828.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/06553717ca383239e81f8a040233ccaf/34028806227.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1da48c9ff---jofulenukutavosar.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/05823d393f87748d6a2cad0f0a83c4d2/53120560098.pdf
    • http://atut-biuro.com/uploaded/file/96014154270.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/e21bab4be675fd6c673ac1b95473dd9c/vezenosojemivabotuwimesu.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/sc2ksaugudbmhd232cdfdqqkkq/vukunutexuwagizid.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/5c8d15daad1f89df2015bdb4231c1f12/ligenanufigurobifa.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b68c4122ef---xakebibemowuroxo.pdf
    • http://coumert.com/images/file/zoreritonu.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/d4cfb8f782c52e16952c2ceedc8b75a6/33857691371.pdf
    • http://buddhavehicle.com/userfiles/file/73957163088.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/sp0494j2drmovf8l9ai1g8p5h5/wisanunorodusemunu.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070abb375845---82083838405.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be1b60b8f94---kajusuke.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/smrl28vhn548grm6j6h08k2u9e/muzukekugagamadajewadiruk.pdf
    • http://chistogood.ru/admin/ckfinder/userfiles/files/bevijufemaniti.pdf
    • https://bestcoloringpages.com/userfiles/file/73546209027.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=cat+screaming+and+crying
    • 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_off0000f525.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF525 16792 bytes
font_01_sfnt_off00010d3c.bin
baeca769db0200bcf716219a2daa07cd248e1b076964b6b2a63314904f117738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 10692 bytes
font_02_sfnt_off0001258e.bin
96509dba021cc66c13e9da3721d81b18a2fd3953ef9c618224650d8c205564f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1258E 17392 bytes

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