Malicious PDF — malware analysis report

Static analysis result for SHA-256 67057d2191ef0acc…

MALICIOUS

PDF

82.8 KB Created: 2021-09-10 01:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 93c32425017e5576e535aa0ebaa78206 SHA-1: cc80f5ae7e6b071d57188b60e7ad0f41c62f8d15 SHA-256: 67057d2191ef0acc2efb5ffa332d2c26499f8dc98b3931c37fcf2645d4c9034b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs indicate an attempt to redirect users to potentially malicious sites. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://boathousebrokerage.com/userfiles/file/16360902212.pdf In PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/bosm9r24dao8k09106psauiern/60189914018.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/tilovinefidatewip.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/givifasifasakepajitiw.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/86408017375.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/97228748763.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/97661053517.pdfIn PDF document text
    • http://cyclad.org/UserFiles/file/gibubugajogimazifajejuxob.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/68634539095.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/61456274106.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/sawegezarizelumisiwaba.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f4b175fca---lajil.pdfIn PDF document text
    • https://netlandschool.cl/files/sugofadazigojabumu.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/mapujosivu.pdfIn PDF document text
    • https://mihalex.by/files/files/6667962118.pdfIn PDF document text
    • http://ranch.pl/files/file/lezixusagazosixo.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/50681493194.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/4483218703.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/jidagadulesakep.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/74430329315.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/tutoritusa.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/76848945957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ps4+jedi+fallen+order+cheatsPDF 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_off0000dc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8A 18552 bytes
SHA-256: e1f8f51d54c1bf42b6c3fbf59fc4678c6da4ffbb0ba99041d5ebff6e2f59b6db
font_01_sfnt_off00010cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCE 10784 bytes
SHA-256: 17cbcf026ff2c3c14618d614582cff6e4d9158bee9f2ff41b870e887ab701f71
font_02_sfnt_off00012596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12596 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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