Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0d5138a1bc9d83…

MALICIOUS

PDF

84.1 KB Created: 2021-09-05 00:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9294b95d4d1eb88f2996bb86e82969a1 SHA-1: 029fd23992d7cb236e9f45a0a02f2ea3131e3c1d SHA-256: 6a0d5138a1bc9d83938365331b6ba918d3f9edc4fc5347622cb8cadb162b240d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://archism.ru/uplcv?utm_term=bpsc+mains+syllabus+2017+pdf PDF link annotation
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c8d1d4b7e---37482459206.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817f82b5ea4---32320231729.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/79961706698.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e345b396004---fezuvoroba.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/wonegimesewefubiwewigelap.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/b0b7f8bdfbb4bd33c93194c8e2bf4fed/zemasudusexavuwuseb.pdfIn PDF document text
    • http://midel.me/userfiles/file/96142730672.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/pufokoxobujido.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/jegafoviban.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/61000509100.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/a38b0be9a1370f1a86497c927edbc1cb/kidup.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/22459434734.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bb4e084a7---82267694800.pdfIn PDF document text
    • http://charontrade.hu/data/file/14387494097.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/sogiwoluvigalaletezoz.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/7956057383.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/sirevorabasirike.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/golakijivamepapezu.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/mozazexibovaforozasolab.pdfIn PDF document text
    • https://www.casestilistas.es//ckfinder/userfiles/files/gotajovakesofobi.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39750331223.pdfIn PDF document text
    • https://semut73.com/contents//files/80223976920.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/gimifalinesuforinukafiwum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE273 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA85 18224 bytes
SHA-256: 3fcb6968e71bc9fc03d2776d279ad4d7af6f389b09fbb9e06649670d3118acff
font_02_sfnt_off0001296c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296C 11084 bytes
SHA-256: 97c4230e5577394884695a01f5e0f17a8d34b0f9202fcca079233fac6254268f

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