Malicious PDF — malware analysis report

Static analysis result for SHA-256 165a58a9e37e1b64…

MALICIOUS

PDF

108.5 KB Created: 2021-06-14 19:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c036ae533584a9e3c2f6851b9c2ec41a SHA-1: 83995a1d8ad9b439a8858c38db1940ecab445985 SHA-256: 165a58a9e37e1b64f05a38687d6f14ced6b8eb3835496aea76c26544fa0af206
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains numerous links to external websites, many of which host further PDF files. The 'ML_NYX_PDF_MALICIOUS' heuristic and ClamAV detection indicate a high likelihood of malicious intent. The presence of a 'callback lure' suggests a potential phishing or tech-support scam, aiming to trick users into interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=gta+ps4+phone+cheats PDF link annotation
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/157c2afaee987b82a326eb1cc5f96060/duluv.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ea28463b983424bbc02be86d156040ed/5966254407.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607922f2e8145---jerudoxe.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160921bc0703be---91597359608.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/3342u5paeii4gqfps846rkpn03/95714518356.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/bbfc72ae8560ea3ff6f6932a4c20642d/3772807758.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/n367treoiaghge5kp0o7ca6b49/kafid.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd8e1ad0ea---89641024444.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/n35ggfkno41hc4ng0163gpattk/73366915860.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1d7aaec1b---getojajadatolip.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/1412977f9c7448e821149a4942457166/19280472098.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074db66d4098---39023099213.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/2mblncosa7o9i4quhqo2lrnkl1/lupejotedatumakoka.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/jekemikutisore.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/79142672711.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/65549112287.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jp5mc4p5e29bnpd2tcnt4ahtek/58109573792.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c023c5a994---rozofakarozawodug.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4d195ab22---jimuvidujab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CB1 5012 bytes
SHA-256: 8037d4dc34c5a511136f3f9a2dab2e3a03b3aa21d64bca5587509305c9b07eb0
font_01_sfnt_off00017dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DCC 11532 bytes
SHA-256: cbbb45621dad44a9555c90ac901b75c42361fb9e0b4ad0581b9d358e44b0605a

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