Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30f42361e3352c8…

MALICIOUS

PDF

83.9 KB Created: 2021-05-11 11:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 51d9bd17dbce0eee0e01adedb71d6049 SHA-1: 51d1310d286eb1c870f92e60dcc66fa178653d3a SHA-256: f30f42361e3352c8c47e43a3635400b9676732be1ab6e5893d9b9a8f607c515e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were extracted, the structure and URL patterns suggest an attempt to lure users to external resources, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f713fae0cb---tatozevalunoni.pdf In PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b5d004bb7e0b56ebf2f36a2bc6139e3f/80059711073.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607260a7aaf04---80587757943.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7dd11d0007bafa50db369d0ae1b4f025/dilubas.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/tozajivido.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89de94b0f---21887197144.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080a235ee711---97107835686.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/6613dd8807b2a702234a4d74f0c3cdda/tezub.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/bigunojukelowumugonipavu.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/dddc421683047333214681ce51937ec7/47234328909.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095d84def828---13771843765.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/golomijir.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087df1427f1b---bixifiladuluzog.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/kteespe2v91f7522uo6ogr1ot6/davofomitopufufidig.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/c2eaab503e5aed5d597ace26d38167ab/zaxewivigumob.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/57684217449.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/d72c457fa482bb3ffc58021f954822f2/93327085819.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=arjun+r+meda+video+songsPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BA 5240 bytes
SHA-256: a288402bb8e75b1d5bc125630262538c2fcc8d8379309d2574bc21976b7eee44
font_01_sfnt_off0000e37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37A 7904 bytes
SHA-256: e6bcca7cc0e0882ad2d6d37945eac8ea8c3fb3866a32f8b1829727807493d03c
font_02_sfnt_off0000fce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE9 4868 bytes
SHA-256: c7ea0897408b595afa8032a4874d93c88aafaf3b5535c1feb219fcdf63f1df75
font_03_sfnt_off00010dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFE 11192 bytes
SHA-256: a7ac69bbba39466e8e54c478e98e96b2ea6bd8d491667a56be6184a14cdfea5f
font_04_sfnt_off0001333c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333C 3552 bytes
SHA-256: a7f1cf2c0387de2bbf599555ce93ec4e920c1a2701c4cf08b45c55ecaf71a115

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