Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88fce8f6b48afe6…

MALICIOUS

PDF

89.3 KB Created: 2021-07-28 09:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ea2ae1074b451004ac4bdcba8f6c7f27 SHA-1: 795cebb03ed0b02b3c9cfcb3eb0847e1f995a78a SHA-256: d88fce8f6b48afe6566cb306096f41cc2bc58040cc77494144d321724d0d8911
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive, providing a password to bypass gateway scanning, a common tactic for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://panificiopasticceriabattaglia.it/file/davotete.pdf In PDF document text
    • http://misosmile.com/upload/editor/files/49779374985.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/os75pblf9jcrbacl2tobnm7tur/35391286746.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/kokukadud.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2d41fb491e---zalaxorurixeved.pdfIn PDF document text
    • https://epiphanych.com/images/file/vorenezupe.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/19732032022.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/fifumujasip.pdfIn PDF document text
    • http://namngonviet.com/user-/files/kixuxofimanapeborul.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/6c2hs908327l6e9q58rvnpe9g3/17332291104.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/98350201478.pdfIn PDF document text
    • http://skikk.be/app/webroot/files/userfiles/files/75692296223.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607261a28adeb---gajerosilalob.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/96444202823.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/kutunikirato.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/jsqe57vk2aqe93l75m1a0h3cn1/vobozutefarelivowadiweju.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/msamp86fu4mm2jkrhjcsmjeqt6/zipudetiwakimezosarevasa.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/5ei1hs1nv4hrajpfal1smdg1g5/nazusilepixi.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/busovetogunesokewoponaw.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/56268612202.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaaee5263e---14715415598.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/dewifabogija.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+use+gt+recovery+for+androidPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 10960 bytes
SHA-256: c446f8e1f7bb719d05579d79ad8991f9cf6c3141cdd258fa274932b6e3885b02
font_01_sfnt_off00010f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F99 17248 bytes
SHA-256: 7dcf522a576d2def202781f3b7de4c88e5116a6d4a7b9240d6c08d67e50c8235
font_02_sfnt_off00013caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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