Malicious PDF — malware analysis report

Static analysis result for SHA-256 09246cd8c44cd622…

MALICIOUS

PDF

88.6 KB Created: 2020-12-15 14:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8068a22bd45de6056aa82f766435407 SHA-1: ec9855758a57faa91cad11b0705b4dc86280231f SHA-256: 09246cd8c44cd622ae98d418762963c376227fcb2f5a7e9e76991f1347cff31f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that redirects to a domain associated with phishing and link farming. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute malicious content. While no scripts were directly extracted, the PDF structure and embedded URI strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/123?utm_term=area+of+a+triangle+using+sine+worksheet+pdf
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5fa541c9469f6.pdf
    • https://cdn-cms.f-static.net/uploads/4391605/normal_5fc2b801cdfda.pdf
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5fc1e4f3cc4b4.pdf
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f90f122ec827.pdf
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/e43e14dac16238a.pdf
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/5476235.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/98d64809-31b4-4f50-b519-50e383a50c4c/billy_graham_books_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/d8fd28fc-6bc8-4b12-8da9-525f0a733b39/dimevabivu.pdf
    • https://uploads.strikinglycdn.com/files/cded1bd8-d7d7-4f5e-a63e-0ce8e7216502/fiborusifurumo.pdf
    • https://s3.amazonaws.com/risisipajole/what_is_the_relative_location_of_mexico.pdf
    • https://s3.amazonaws.com/gezizefefififa/danexekikur.pdf
    • https://uploads.strikinglycdn.com/files/8bc7a22e-0abe-4d8a-b630-db6002d477c8/43067457127.pdf
    • https://uploads.strikinglycdn.com/files/328157a2-2a21-4ab3-8af2-7e1fabeb273b/geometry_dash_30_demon_icon.pdf
    • https://s3.amazonaws.com/waxapoz/dawejimevakokenotajofigaf.pdf
    • https://s3.amazonaws.com/wiwuxot/lirik_lagu_answer_love_myself_dan_terjemahan.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb1.bin
42f3de760f872bf834e9022459e83c41f49d6eaa9740497411ccde9ccd25b9e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB1 14868 bytes
font_01_sfnt_off0000fb3f.bin
06d927bb2b6daf891478ab4cab90709232d593f7c9b2cc46f53d704c02e6609f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 1964 bytes
font_02_sfnt_off0001048d.bin
de3c6bb46fc47dad27ed9a3e5a15c03fc9b55705244ad13c4fd756d224837cab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 5448 bytes
font_03_sfnt_off00011727.bin
ea4683ab4427d7128c9643806bbe9ff874b5bc01dc7274142c8b3deb06e27cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11727 10988 bytes
font_04_sfnt_off00013cea.bin
4c6c8a12c59d7e97a6e96260bc1c223f9bc2b4f2693cf27e519b64f993b642b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEA 16192 bytes

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