Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e927102bb6a5a62…

MALICIOUS

PDF

76.3 KB Created: 2021-09-04 08:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2592ad5438c278b6d8a20b5cca75313b SHA-1: a0dcd2c618055fbc6aefeea7b31deb6270ea0ab1 SHA-256: 2e927102bb6a5a6245c98ae9ceaeaf0c690fdc5d1aee9b12ce904d7703898eb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is used to facilitate the download of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://xo-sound.ru/userfiles/file/baxubarufutolenomerikoba.pdf In PDF document text
    • http://afslab.asia/upload/files/ripabobuxivawo.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/2916f4dfb67cb984c8cccf46a0afc7ba/90865083659.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/81227992288.pdfIn PDF document text
    • http://spakimthi.com/upload/files/2732617643.pdfIn PDF document text
    • http://waterreducer.cn/d/files/38904851754.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160df015e4bdf2---88276317849.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/zijugubetilitegatifila.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/leruwixevujexe.pdfIn PDF document text
    • http://df-foundry.net/d/files/kaposuvixiwijirawu.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/sekaki.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/gejetenepomumojedorutipa.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a05b668342---96472827285.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/pozuf.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-7-8/20210708095206956186.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/44537856265.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/85e61ca831dbcc9e62497cb84183b5e4/41281381952.pdfIn PDF document text
    • https://x-software.cz/data/file/davizigarofikeporobisabem.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210704205840_8z94h4.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/72304265741.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608b957a64b71---ferir.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/caec84df4410b9964eb28fd9282168cd/jududotimiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=free+download+pdf+reader+software+for+windows+8PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC560 10760 bytes
SHA-256: 7fbd887f70c6ac0cdd2509173cd6d12ffb87bf5465c1e4a9b8c3124440769f68
font_01_sfnt_off0000de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 17292 bytes
SHA-256: 549ad01d765b68103ad9ccf250eda11ca5d0ebb30eb2aed8ebcfb933f214cf69
font_02_sfnt_off00010b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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