Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0a0e020cd1f60b…

MALICIOUS

PDF

89.4 KB Created: 2021-07-02 10:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0fc880f02f6e7af137b4025285c422b6 SHA-1: ae20f006da1f885aca00eaa0377c8e0054bdb713 SHA-256: da0a0e020cd1f60b5e0ad59330bdd3cce71f5d3bf5f0a4944986c29a24f81256
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous other PDF files hosted on various domains, some of which appear to be compromised CMS uploads or disposable hosting. The primary purpose seems to be redirecting users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://lapawan15.com/shop/fck_file/file/77720761104.pdf In PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/0e09ba0732a9631611d78786f57be3b2/bexavitevesunasidavexilot.pdfIn PDF document text
    • https://podimercrm.com/img/files/vetavaronirifelumidawada.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/kijumazulepufuwirebowelu.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/9d108086912ee160e5da344487f47b60/96816793809.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/nedofovojiku.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/lofositofulukibupi.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/semisarireguwewiwuz.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/31605276892.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/okc1cigulk4i69k9bbrukn1ngu/8178313630.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/6508449633.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/muxuxokovuje.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/831a4e4c81ecc5c7752ab42c057ed0b5/pevizemujofo.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4461697911---zisonikepedotopewojizudeg.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/6f9ade159bac549e7c3799059c3e89a5/29286781028.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de4961af4c4---viseburorel.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/lenevawuwopamaper.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160746b3b85055---pagedisiram.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6be3e0db3---65991133060.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/redevi.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/6380270594019e5f6dcd05299eb4b873/37876888967.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/13284086530.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/db53ah0q4jlo243qhtbjgpqh0d/jefusazewuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=leeds+wood+recyclingPDF 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_off0000fe4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4C 10440 bytes
SHA-256: 9fed2153131e865e4800fa8a68d4329388e411f527219ad95f7cda904baf08a5
font_01_sfnt_off000115dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 16564 bytes
SHA-256: 86b5eae323124cce24ebb00243122118701a48cb74635a4daa73a06c39cc656b
font_02_sfnt_off00014095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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