Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e107e917e35348d…

MALICIOUS

PDF

67.5 KB Created: 2021-09-25 15:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1227cab88fea050fdede473dde08d869 SHA-1: b41b78442f69aa00f2d39dda8889bb96ecb14fc1 SHA-256: 6e107e917e35348d655e885882f30fc7b461b65f64bd619d8da227cca307a841
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a phishing lure due to its small size and image-based content, designed to trick users into clicking a link. The embedded JavaScript and numerous external URIs suggest an attempt to redirect the user to malicious content or download further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 1 text block(s), carries a click-outward action, and is only 67 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://theflowermaker.com/uploads/File/mitimoratufefizojanuv.pdf In PDF document text
    • http://onfireinteriors.com/userfiles/86312017625.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/difiwikejopodivuvivuk.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/sumufizazomane.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/mukel.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109060247153299.pdfIn PDF document text
    • http://lagrupacio.cat/file/puxadovetogodarod.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/67706405746.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/31394704245.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/45394780229.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/32444945702.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/77997414221.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/87472712519.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/junesewisubigaz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/86d3fd3ac135907e7a093ce35bbd9ba9/13838258888.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/11468786903.pdfIn PDF document text
    • https://codefon.hu/js/ckfinder/userfiles/files/79030446733.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/gabuxogali.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/jutamozejadudatufume.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/aee5a59eb09a61bcc94f04fd8b1faa58/27512049481.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210923130508.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/vokiligodabovumiwaxiwes.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/36679188252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=flashlight+settings+androidPDF 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_off0000adbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADBE 10504 bytes
SHA-256: 424c6165a4215fb7c6d8f98d25d91d7c297d32b3ddfd26bbd1152028b58f1f2a
font_01_sfnt_off0000c54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54F 14300 bytes
SHA-256: 7aebb15dd87a9e974cacbe3cd69d606891a0b20de52e1be2b6d5e123e7b51771
font_02_sfnt_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1