Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9fa9da7b88c6d4…

MALICIOUS

PDF

67.5 KB Created: 2021-05-04 02:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3de3acd10c0c8f47b13bf74402b97583 SHA-1: 34e3d9f86a5bff04197c8a6ce52fe984c6afabf6 SHA-256: ae9fa9da7b88c6d4562b0afd60aa2dfd49c1dd911b8ad2f1315fff35856a88f4
176 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised WordPress sites, many of which host PDF files, suggesting a link farm designed to distribute malware. The document body, though heavily obfuscated, appears to be a lure related to 'family reunion logo templates'. No scripts were extracted, but the presence of multiple external URIs and the ClamAV detection strongly suggest the file is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d56edcdbd4---38787903271.pdf In PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/25d94d3ed05238ab1ff16362f9bf612f/bawukun.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/7eofijm75qu72eoe90u0hckdlv/25985746264.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/bd284cf645bc23a0acd3e1c9e0179e90/ferasivifuserefibiles.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f199a7c644---jirilumumoduseraranirevip.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/f4nts2tbipdv6g3do7tu705fo4/93172268503.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609075cf21d16---xisoluxujexasodana.pdfPDF link annotation
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/4pa28ti5m0frhmen55jcrcs0ce/xiviwodupajawiwefox.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907052b73e0---gomiwurabojujufopikafeze.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0aba843206e9e88893b84a601f15970a/velegefad.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/wipazefoxakikut.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080bf950efcc---47385408665.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/6g3irnr4k643rsnf1vcb087950/98408310135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=family+reunion+logo+templatesPDF 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2F 5196 bytes
SHA-256: e0ec9a71fe681ddb4caf46ced4ed9c2c7242568307c619f9d386bc3918107fe3
font_01_sfnt_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 10076 bytes
SHA-256: 296cfb0c4f3de1522ae3c30d13df4e49f9c8cc7732b0b634ae748cafd2c390e3