Malicious PDF — malware analysis report

Static analysis result for SHA-256 1980eaeb3a9aa0bd…

MALICIOUS

PDF

72.4 KB Created: 2021-09-08 03:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f7b2aa31f7c842ad66163c5a19ba0caa SHA-1: 21286890d648c17d723536802a294add8aa4c1cf SHA-256: 1980eaeb3a9aa0bd045a8087a0faa262f0d762618fbd029683c975db13f8ec9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal a link farm structure, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of many external links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfa1717a59---pedevodedegagen.pdf In PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/cee881c374f315141f6e5042f7828655/luriwagej.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/81963663709.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/10143370976.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1ede24f79e---lewatonotefixevodoboga.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021812815452747.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/nanapona.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/ditalo.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/tovofitijora.pdfIn PDF document text
    • http://unsersohn.ch/images/file/70663656956.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/pakisawirabesajaze.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b456734aa---saxonu.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/46927502786.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/68c974550030742176e29c3dd997d7ae/dipugamefabafaw.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b971573f2---57150652700.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/bofumanamavolu.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/6dd29fdbf76eb33e7f9e6d64932617a6/52152818972.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/11453925075.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ef08dd523---8944113295.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/lesova.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/23108684471.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/42484501933.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/f5a0ff385fa3f69e38330c49fb7fa350/xetarevafawilozid.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/jafunumateguzi.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/83882783669.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=alimentos+para+diabeticos+tipo+1+pdfPDF 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_off0000b85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB85E 10952 bytes
SHA-256: aabd0f882204e2b0c2502224be8b7d5ad9377cf220e50fa6270013c9c8d0b1e1
font_01_sfnt_off0000d193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD193 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A5 16124 bytes
SHA-256: 5b4c1e6b434670b868df0b510617dc5e39d2dc59cfbb49c14de4e217ff6f0f5f

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