Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b8a9c5c89c9e8e…

MALICIOUS

PDF

90.2 KB Created: 2021-07-07 00:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 274b086915db1ccea80d6b54ead1076f SHA-1: 707cc44b23b268e13ac3c6ce20737df938c3b829 SHA-256: 74b8a9c5c89c9e8eb787ec8559fdc0fbfb1f9c83bd6c08744168131e763aeed2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites and appear to be part of a link farm. The presence of these links suggests the document is designed to redirect users to potentially malicious destinations, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/uplcv?utm_term=easy+brownies+with+cocoa+powder PDF link annotation
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed0b42ad78---vovaloxejawipijesegu.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/92dc3e79e567f3acf4e15b79e584c3ad/wudawosazef.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160c12fa8911c5---72147248711.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/26774413342.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789772a1e59---94439899025.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074277b46236---16361763537.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad97d50c36---gejaribapenamifunewika.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079564ca279f---50967321806.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/85814105223.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/96782168490.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b829c1b81---zalizufofulapad.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2872e13804669e4ec70107461acf303c/sozefotufikagapidodo.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cdb451c8858c6910ad312b202536d3ff/topixamudelofogogodefunub.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/45824539051.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/9dbc8a53093e5ec1d152a3683bcb6fad/16904397891.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/32665677102.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/0f07132a45c56a776c01bfc83ca1d857/73124725161.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/82228a4bdb4e89c6769a976c56a00fd1/nupixikuzomakixotezolorap.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///zudujuwebiloxap.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/pilelonujodalob.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/d554d79501658c241f67d8ef0af01ff8/84559757320.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/14003536520eef69d981eb888d0b6921/mudijudurudosofodasu.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45b1fe71db---tesitogifilax.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ac663113082---57753106461.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/67586829445.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_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 10888 bytes
SHA-256: c66d2b125cd2c55b018bc8999f70568f8c5ee220bcbe377da0c49e0e4e927d45
font_01_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 18700 bytes
SHA-256: 6ec2aa8cf353dd0521783244b5c62eecc95e0f43ef1ae7500ebe9f704c953de5
font_02_sfnt_off0001434f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1