Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7eb34aeed79ff7…

MALICIOUS

PDF

89.5 KB Created: 2021-06-26 06:35:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 437a0ca1fc4310362da1b587cdaa3461 SHA-1: 86b0ad0bc30365c819581fc5fd6486cf3b427d1c SHA-256: be7eb34aeed79ff766d766a50c86d8b18c0d0dc2d5852c7b08530ab8d0bb8393
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised CMS upload locations and disposable hosting sites, indicating an attempt to distribute malicious content or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it is designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://jrpst.pl/userfiles/file/9483215458.pdf
    • http://accessiblevehicleservices.com/userfiles/file/bunawabolanina.pdf
    • https://isosklo.cz./uploads/22046935584.pdf
    • http://alliance-ic.ru/uploads/file/12206191107.pdf
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/sisikebuwedik.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/8981068fdf8afea055a07070bf0bcfd1/tepazowamepe.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/sosozikedogujifisalaruti.pdf
    • https://adtw1.com/ckfinder/userfiles/files/59856589708.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608007cf4dd05---pikoredojo.pdf
    • http://vinmexindia.com/uploads/zuvif.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nutjc86k3n72g9h0b50q7k7l00/wemelatokopeduluvo.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/072ff66e0084fccc761425aba65f7522/26719805258.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/7cd190b5da6a794dc375389f74e097f1/zagorapimavubuvupolebi.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae4f5cb267---buxiv.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82a813bb00---89854117114.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/kofalipaba.pdf
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/81290646377.pdf
    • http://absolutelyneon.com/userfiles/file/29647568732.pdf
    • http://jnnycc.org/userfiles/file/95122749477.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/fe605cff469fbff2aa0ef5c719c49072/35953783166.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096e1a6620e7---39745806454.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fffb493bff---75787987877.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+cut+own+bangs+side+swept
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 16792 bytes
font_01_sfnt_off0000fe2b.bin
adf38969d40f501586e0caf93d33991e243baeeecfe575c4831cdbf64b7044fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2B 16336 bytes
font_02_sfnt_off00011429.bin
647f83e0501150ea081a900e9466722e7fd29291ec3bb70e11c7ffc55568226c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11429 16672 bytes
font_03_sfnt_off00013f9c.bin
3969195645982bbfe5992a16581c59d1fd24e051a6648d21e8da5f606fcbe243
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9C 10860 bytes