Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3abc9e1d7543d21…

MALICIOUS

PDF

69.2 KB Created: 2021-09-03 07:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 32f93e8639dc6bc4e147e2a37042ee38 SHA-1: c08e76b6e5868b24b4547d4bd1fbe8e0567aa9e1 SHA-256: a3abc9e1d7543d21685d17a7377636f71ae6878a1e21552b222ebdbab7e4cc29
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. Several heuristics indicate the PDF is part of a link farm, with many external URIs pointing to potentially compromised or disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://diphong.com/uploads/riramixelunub.pdf In PDF document text
    • https://stallion-international.com/userfiles/file/77525420796.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613158d55f4b6---fovufa.pdfIn PDF document text
    • http://herve-coiffure.ci/files/litugosololupeloj.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61b8ad4cf5---nefalavazewod.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/80263921589.pdfIn PDF document text
    • http://decorstore.eu/upload/file/fizazagebotorixopavalefa.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/18728310320.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/ranezoti.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/66000646853.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/82740803377.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/gutulaxobexaxivuxo.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/74001872514.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/0cac16077656e1a4f6b7896afec925a5/36522133731.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/jaket.pdfIn PDF document text
    • https://kar360.com/resimler/files/62597684271.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160791725daab8---xowagofon.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/93063828561.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210714014539546876bbjusmw8x09x.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021062418480773499.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6f30b45f35d3ce6f834b3ab5b03c32aa/10026142530.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021081014032273499.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/d10b2ce8fefcb19e93325335edca7a4a/jexibuveb.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/pogutelitiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=iq+test+espa%C3%B1ol+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_off0000b1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D0 14568 bytes
SHA-256: 76e31e09d9c68886a0f0113e3d91960fee6bfd33b15e07df66660f14808e42d5
font_01_sfnt_off0000d602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD602 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE19 10500 bytes
SHA-256: b0f1fa760989f6ab1048c7327147f43a9bb203dd7a91805a5def50d79f9d189e

Open this report in the interactive analyzer, or submit your own file for analysis.