Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a012166a0a63895…

MALICIOUS

PDF

85.1 KB Created: 2021-09-10 09:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a00d8e5942ceab6564c935dc4d2c6120 SHA-1: 5e9efa9f873ebaa45487d4810b28a8dcafe4f933 SHA-256: 1a012166a0a63895acc6502d5837e45c627064104603d8f06a5206f4ea751bc6
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery via external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=beyblade+burst+app+apk+download PDF link annotation
    • https://alexandrapanayotou.com/web/images/static/file/80818406572.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/93435721910.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210906112755_2147191015.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/gedukitoxuvujamawugurokox.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/risawozasoxafani.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/wojajisufoda.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/71068570821.pdfIn PDF document text
    • http://15881588.com/ckupload/files/viwudilafogadozoxunufawu.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/5d99ec6228ee11f4dfeec0a13ab12715/lazenugomogomo.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/98602400128.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/gadadetut.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/80696007180.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/tigatujutagidoxodeta.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/43036870128.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/18511098487.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/paganefapobal.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/76674742982.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/11622535340.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/18244594020.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/98979810930.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371b535e8f0---50801738388.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/4278463671.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16132062a1ffb7---14138293832.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC600 16352 bytes
SHA-256: 9c09c88ae8c16bff84111354316359d021997fb4aad4f8972c10b81994a3a1b4
font_01_sfnt_off0000dc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC64 21200 bytes
SHA-256: e09c79b63094c8e2509e9ed4fe27897b701c85f73e0ffa26b0dbabf4d344156c
font_02_sfnt_off000114cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE3 10880 bytes
SHA-256: ff794ef50310a9d34a28b734d538f2b00f22faecc20b6b53add860ebc1b71048

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