Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b8852626ef9461…

MALICIOUS

PDF

83.1 KB Created: 2021-07-16 11:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64779e9c0185fa533b821025599c40c7 SHA-1: 6fb28e7d09b39957b0cfe58c255fe38f5527b5c2 SHA-256: c5b8852626ef94619c7f79a155fb87483c52e957db5ea488aa985abef60e2eb5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'drafthe.ru', which is likely the primary distribution point for the malicious payload. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 4

  • 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://drafthe.ru/square?utm_term=h20+covalent+or+ionic
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edc1e88f209f4d82810739/1626194409035/foundation_in_civil_engineering.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7f1f7726b430b467d545/1626111775588/how_many_solutions_does_this_graph_have.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e85d9db36e8a0f29089e57/1625841053729/manually_propelled_vehicle.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1097046c0d74f87dd9de0/1626409328711/motion_capture_bvh_files_free_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1296f4bb49071de19adf0/1626417519301/37894480824.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee83449b1e4d6a361110e2/1626243908971/12990294622.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edbd67cfabb53e43cdbe06/1626193255864/zakat_is_associated_with.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e90a62b630645a0ef67e18/1625885283133/guided_meditation_in_tamil.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f07246879468132506758b/1626370630895/14304848775.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e84ac78d23a90293b1d265/1625836231518/sewamiboduso.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a7.bin
59d1645a132c566162b038a72395ad554a2a4125592b5fc9783bac9ec24b94a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A7 16868 bytes
font_01_sfnt_off000110d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110D1 16792 bytes
font_02_sfnt_off000128e8.bin
6723aa5287982d52d05c21f7d1e57d381f55e3528cb0c78e914cd8bb1e87481f
pdf-font-stream PDF embedded font (sfnt) at offset 0x128E8 10352 bytes