Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ce7f83ee95e12c…

MALICIOUS

PDF

81.0 KB Created: 2021-09-20 04:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f144e85482ceec620c4c27d14074326c SHA-1: cedf55d3d0bd5aec4d64b6477479ebad2830ebee SHA-256: 94ce7f83ee95e12c3d82f3135aa0bf02f90c8974b220d0d41774abef16b5440c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure indicate an attempt to lure users to malicious external sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://drafthe.ru/uplcv?utm_term=barber+salon+open+near+me PDF link annotation
    • https://fasaac.org/temp/files/32986709338.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/49289434759.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/53374959646.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/ce46aad69af41b6dfc301690d422f1d4/58221266193.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/44546688834.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/dakanopapewak.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/17003550255.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/fa91deeb7052bb129689ffc202ab7e60/73970018485.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/sewuvepomanorujap.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/pikopakibabutufubixakapu.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/84934791361.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/40099269174.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/23478930576.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021091002171589.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/f5ede45bea1f775d71fb15873f0ab9f8/tiposigufemiwo.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/dobifasotuwejisisivopusuj.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/katasafug.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/fepekusiloraduzil.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/zodasisijew.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c3276dfa1---80090702856.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/76392708376.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/53935518225.pdfIn 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://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_off0000d708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD708 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 10416 bytes
SHA-256: 26807b0450a3cc7fd0307da2a7827e23990bf518ba0eef144a242b1ac059141d
font_02_sfnt_off0001067d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 18500 bytes
SHA-256: cb50f4a45dc1a85b14952daad85f37dd8f86bd8d6a46b036efe3955fabf5e111