Malicious PDF — malware analysis report

Static analysis result for SHA-256 613eccc8096999f4…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 10:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: beba1ef8d28d16a95502f4a056d52626 SHA-1: 141a348f7b09c3907ae63d08a4147d8f60a2d4c4 SHA-256: 613eccc8096999f4e54676bd34f16e5535f1c16bedd6c4e8f4b9689d1c03f920
86 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by an ML classifier as malicious, with heuristics indicating it functions as a link farm. It contains numerous embedded URLs pointing to various domains, suggesting an attempt to redirect users to potentially harmful content or phishing sites. The presence of a QR code lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://dancephoto.ru/userfiles/files/69294345444.pdf In PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/43163646940.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/xulovekeledajeduxig.pdfIn PDF document text
    • http://okna-kursk.ru/page_edit/_samples/userfiles/files/25018791774.pdfIn PDF document text
    • https://vendax.ro/files/file/41000049096.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/tixejaf.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/72867419510.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/4324508685.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/fowubefoz.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/12300837892.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/68277999856.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/74885432678.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/zegafi.pdfIn PDF document text
    • https://zzhqhi.com/d/files/bivujuzeripenedibo.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/xiratagulesamixidunisetu.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-9-6/20210906014823503731.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/gezulewosaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=android+pc+device+managerPDF 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_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 10592 bytes
SHA-256: c1f2eee171d1fdf8aa8e851f564bc3f44524011770a82244abc9763d3ff378b1
font_01_sfnt_off0000f810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 17296 bytes
SHA-256: 7f4fb04d200524ec9f183208f479d41584e5845a5a6a23afb986b9c4ac1d494e
font_02_sfnt_off00012495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12495 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.