Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e32923f8b02d85…

MALICIOUS

PDF

79.5 KB Created: 2021-06-07 05:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1de5164a1d999328259234e25fb096e6 SHA-1: 50628e760d55c81f3add7ae609a000550c6c08b4 SHA-256: 49e32923f8b02d850f97eaee7d37a3c5b7aae0a5e5b6e8a79540a1692e817232
196 Risk Score

Malware Insights

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

The PDF contains a link farm designed to trick users into downloading a password-protected archive, a common tactic for phishing or malware distribution. The presence of multiple compromised CMS upload links and disposable hosting further supports a malicious intent. Although no scripts were directly extracted, the overall structure and heuristic firings strongly indicate a malicious document.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://queure.ru/uplcv?utm_term=fone+para+descargar+talones+de+cheque PDF link annotation
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab48c35d5bf---pagakisakogelivubepubawi.pdfIn PDF document text
    • http://dzbnf.com/upload/file/%5C/xanika.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092d1bc62069---5155510177.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/1e0f4d33587d94bd863b3d614aafcdeb/47516674021.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/xuvonikimelafana.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/duropujajopigolixob.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/9b8055d3c208e492af878c2f81bf5820/46438519691.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989c69ec0ae---63937495179.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba52282aba5---rifabosob.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/94264496981.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609665bde4eaf---21076965693.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/zapatupejuwufazagos.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/vagodiniredewu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/t0fvdid576vhgbm6o2hb9qajp1/19046012751.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 3312 bytes
SHA-256: 082c89522e4251f0a814862fddf633b1dac669eb780a02580130c1f52bfffe84
font_01_sfnt_off0000f571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF571 5416 bytes
SHA-256: 4fb5f7d555786d2e8532ef00f4387fc390d43052971e2e95e9dd7391efb1b0c7
font_02_sfnt_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 12064 bytes
SHA-256: bbc4342673b2aadd2ecc443043537d8dc446d1f10b955eda9fa5e2db2640afbc