Malicious PDF — malware analysis report

Static analysis result for SHA-256 04469f71095cb639…

MALICIOUS

PDF

84.7 KB Created: 2021-09-01 21:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8b4b0428bc4450d15201a16bd48f5a99 SHA-1: ba329b505008b7fcd2de51ae2d4f10b7b33c7ae7 SHA-256: 04469f71095cb639200fbcd3bc239422fd2d0efe48d568398fdf13e6408331b9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d19666ea1---62114650167.pdf In PDF document text
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/79560337088.pdfIn PDF document text
    • http://kustari.net/userfiles/file/29188949807.pdfIn PDF document text
    • https://rotterdampools.com/contents//files/dejowonamit.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/35215730283.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/11099163858.pdfIn PDF document text
    • https://securitydm.com/slicice/file/14637503302.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/1a37a86111dfe2a6845b1ae995e38b37/gipebatapupemuxoweronatej.pdfIn PDF document text
    • http://mav-auto.ru/images/file/nozodamubeguzidedanog.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/21083823368.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/teligurikogujul.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcea8804057---tumem.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/wuwadevabuwa.pdfIn PDF document text
    • http://skolky.info/foto/images/file/14512909543.pdfIn PDF document text
    • http://salkim.com/userfiles/file/lexanidozakoxoj.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75e7ec5005---towoxapusalijuvap.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/e16846e12016d6664871003fce04a278/66625013601.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/9a04bed91ecfff75b37f0eeca2da1d1a/87075160947.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/1a0cbdea0885a9fdead46035f33b94ef/kebudewelupu.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/latole.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/pifolalivibatemi.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8e699b0d4---56968017393.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160899c076c010---33105629110.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+install+jiotv+on+smart+tvPDF 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_off0000e8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A1 10408 bytes
SHA-256: 13b2dbb491f331b0d9dec38a9d7bef5de73c62e3611548224990efb38aecd440
font_01_sfnt_off00010016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10016 17452 bytes
SHA-256: 81649c90ee8a3e2fbe0a3e53555a9a3bdda7c936817f5323e0871e0619e8db0c
font_02_sfnt_off00012d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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