Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2bbb986708d55a…

MALICIOUS

PDF

73.1 KB Created: 2021-06-27 07:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17ac887e7c9b3d00d6eff589478282cf SHA-1: 8d3f632d9b14cd3817cd8c181021d7079aef2734 SHA-256: de2bbb986708d55ac66b3fe2fee57438ed994f6120f6cf147973ce9299d9d349
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains multiple links pointing to compromised websites, indicating a phishing or redirection attempt. The PDF structure and embedded links suggest it's part of a campaign to lure users to potentially malicious content hosted on compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b91bb9d16a2---14541407196.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160791b96ea68b---56575440385.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c07ddebe6---64360574568.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/sku1b03sakfskt1qmc5mu695f8/pinitokesexalus.pdf
    • http://videofilm-tv.ru/content/File/73486119871.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818eb1b7fc0---83980587543.pdf
    • https://alajuusa.ee/media/contents/file/jakewibuzodigopamejiv.pdf
    • https://kede.org/userfiles/file/vawobejaxemin.pdf
    • http://maslatalaia.com/userfiles/file/vazisaxomagefujovizozeg.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/2d1283dd2132b10047e79ef9534128b3/7684336030.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c2825f27b2f---subimapomuxewixod.pdf
    • http://asbufestival.com/uploads/FCK_files/file/wuzasakatotafoxomu.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/23c5119eb83c597ea1c16d8b1ce6df91/fakibarolunujebederoj.pdf
    • http://reinforcingourheritage.com/clients/0/08/0860c2a235168fe7e4a745c824023bdd/File/42264924079.pdf
    • http://www.victoriousintl.com/new/resource/files/lugodafejedeliguguvavipug.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/a7f517e4cda77f28e4bbfa06c9205ce1/kajufunepuruvikumefajaju.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/bhtqntjk3sfpca9nd8ufv0mh3j/sowatuganano.pdf
    • http://aldo-ins.com/userfiles/file/gekakepevumofuwivigag.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a707e0042d---37721591649.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34c336438d---fediduwadovuvotunit.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3fdc49cba---82651902650.pdf
    • http://autosoftware.company/autoresponders_images/files/89266825075.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fd049c267---61092077716.pdf
    • http://www.conectadoscomdeus.tv/arquivos/file/mugivoxiwivapi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=part+way+with
    • 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_off0000c1b9.bin
cbe923835ebae8d49dc75ce9f49f0091e2f252cc88a7bceafb75f19a6083dd82
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B9 15584 bytes
font_01_sfnt_off0000e991.bin
a7d22c23aad688a0c26c53edad0f234ab712cfe8d88832e67af5a97ef844b049
pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 9836 bytes
font_02_sfnt_off0000ff4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 16792 bytes