Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1fb6ee65680a84f…

MALICIOUS

PDF

68.1 KB Created: 2021-09-28 20:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d5c8eeb6d961d3072ae502400f801ff9 SHA-1: d4cc3d541b80e5a0b207ee4f436b777f7123dbf3 SHA-256: c1fb6ee65680a84fa268bdde733de5a85abe6a674d4cd35cc63578c68fa5ede8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, employing a screenshot to obscure clickable elements. It contains embedded JavaScript, suggesting an attempt to execute malicious code or redirect the user. The presence of numerous external URIs, many pointing to potentially disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://tunglamgarden.com/images/fck/file/mufazenuzujigabibaxa.pdf In PDF document text
    • http://hanauhrova.cz/files/47142289531.pdfIn PDF document text
    • http://proart.by/media/file/tugokavimadobobugazipav.pdfIn PDF document text
    • http://i-physiology.ru/upload/taxipitanivigux.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f2eb97a3930e1cdce5f2475dfb3804b0/sezimopisozam.pdfIn PDF document text
    • http://muasamhangmy.com/ckfinder/userfiles/files/71556541663.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/9477078028.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/kivudufagegidulowumokimu.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/88524727133.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/rexokavajurezupeja.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/sowumaziwipijo.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/6910220812.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/mizazusebanodanukakor.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/m08isup0jsqhl0t9khl75f5hpo/wozataxakixesik.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/96544590208.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/funexudupal.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/vavefeborerinowetafo.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/69083245328.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/94737106440.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/wodazabet.pdfIn PDF document text
    • https://olterus.net/contents/files/faloj.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021091115475873499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=android+full+storage+problemPDF 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_off0000af1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC732 11060 bytes
SHA-256: 79179e2fda55bc14b44ed6f2f0d4ddd6f95f9faa95b7aa84dc9f5b97bdc0e3d5
font_02_sfnt_off0000e080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE080 13828 bytes
SHA-256: 92f3ae4a16d9910316372fba0c799603e095a6529b3f830bfc8f4b13f17f82c5