Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef77844a9f6616f…

MALICIOUS

PDF

77.9 KB Created: 2021-04-03 20:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 322ed32ce329af6f4ffb51417351e51a SHA-1: abae1df262af2761ed3ae652bc99f32afc9207cd SHA-256: 1ef77844a9f6616f519095d3dd6fd421c2bae2f3392fd6a5b3a1c02963bfc30a
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to a 'sewing machine manual'. The presence of external URIs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=shark+euro+pro+sewing+machine+manual
    • https://cdn.sqhk.co/bomumuxa/id7hghi/fiponedidinigakize.pdf
    • http://getchambre.xyz/18885034772cn0mf.pdf
    • http://vnds-super.space/declarative_interrogative_imperative_exclamatory_worksheets7w246.pdf
    • http://tumbochka.space/244301482000ukn9.pdf
    • https://cdn.sqhk.co/buvovemif/jgefhck/37316397194.pdf
    • https://cdn.sqhk.co/jidobimatu/vgjigD2/35966523152.pdf
    • http://puveduxorapuba.iblogger.org/57617717748.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/silubebebefuju/ranasuz.pdf
    • https://uploads.strikinglycdn.com/files/7f06534e-7155-4a2d-ba34-78d3526fc295/dirt_devil_easy_lite_filter_cleaning.pdf
    • https://uploads.strikinglycdn.com/files/1993b8d7-30c8-4f7b-8749-86639a767067/samsung_q7_65_hdmi_2.1.pdf
    • http://fafumemoponan.rf.gd/alter_ego_a1_workbook.pdf
    • https://s3.amazonaws.com/kifutizijebuj/dengue_fever_test_report.pdf
    • https://s3.amazonaws.com/dugibabafod/bum_diggy_bum_bum_song_mrjatt.pdf
    • https://s3.amazonaws.com/xarojapi/spalding_basketball_goal_base_replacement_parts.pdf
    • https://s3.amazonaws.com/baposivarabuj/bluestacks_for_windows_10_pro.pdf
    • https://s3.amazonaws.com/rixevozajixezos/gexopalekomobimososo.pdf
    • https://uploads.strikinglycdn.com/files/9f177292-a77c-4f5f-81fa-4b6be754e8da/82244213565.pdf
    • https://uploads.strikinglycdn.com/files/1709ae30-3875-4e81-b395-5da9d06697f4/19311412093.pdf
    • https://uploads.strikinglycdn.com/files/7d2c50fe-045f-41a0-a254-2f1a19c9e861/ultimate_mortal_kombat_sega.pdf
    • http://mesesoriran.epizy.com/rojino.pdf
    • https://s3.amazonaws.com/nokiva/pikiron.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e1.bin
5a0a645d0dadff2597ca27b351a43e739c202d84938661a25df3563e9ff857b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E1 5408 bytes
font_01_sfnt_off0000f81e.bin
2c3f302bf52904160540163d6c5e23db21b55fdcdbafe0c69c119389e730728f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 10468 bytes
font_02_sfnt_off00011bbb.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBB 4324 bytes

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