Malicious PDF — malware analysis report

Static analysis result for SHA-256 695fe60068c309c2…

MALICIOUS

PDF

67.9 KB Created: 2021-09-03 16:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: a4a26130e3708bf62f0a9c8fe21e913e SHA-1: 3ddd35832fd2b6dcd87ff8e4d3bc345d9835e5ce SHA-256: 695fe60068c309c21dc93c4339ea7c2222a5598722e23f9915c73fb797fc0e4f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking embedded links, which point to compromised CMS uploads and disposable hosting. While no scripts were directly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://aznamaste.com/ckfinder/userfiles/files/70929942932.pdf In PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/me4launb0r5m3rgjqnsvis7793/lotine.pdfIn PDF document text
    • http://remobudostol.pl/pliki/rojunepofibifiluvaga.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/wuvirutik.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/3739ed399bc325ad196daa37a4c0c278/62027080894.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fdda23ea94c---35934367112.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/46381937352.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/gigan.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/21486813652.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/5806620685.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/29471415425.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/85tmfbjmmtd8qtmlbrmj1uasu9/mikolom.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607149dd0905e---16187938846.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/87585351687.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/34540263641.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/15244412223.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/19966068649.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/46608187342.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/35424843306.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4936847da8a8aed15a1d83d3440da9c2/pefobiziwamefu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=asthma+medication+chart+pdfPDF 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_off0000aec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC1 10820 bytes
SHA-256: db96a63c9d3f6220540c80a193e74dbcdf54385923caee6352d02993beab5a2a
font_01_sfnt_off0000c785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC785 14180 bytes
SHA-256: 0c2ebbaace392a813d3c79c91c039754d7908f7a3826e4c2e1571214e2c0bfd7
font_02_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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