Malicious PDF — malware analysis report

Static analysis result for SHA-256 210a77bb3319decb…

MALICIOUS

PDF

79.0 KB Created: 2021-03-31 16:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db43095cb57ddedb39f89e6c4f705f02 SHA-1: d7706ccda99013a762bfcf0a482ff0457445f32a SHA-256: 210a77bb3319decbe45902a36a7accb42a9396897f6e976dded49acfc0ab4555
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically 'https://leonvi.ru/award?keyword=embed+animated+gif+in+pdf', suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/award?keyword=embed+animated+gif+in+pdf
    • http://wekanisa.scienceontheweb.net/88365158847.pdf
    • http://wikotimu.scienceontheweb.net/market_guide_for_enterprise_business_process_analysis.pdf
    • https://cdn.sqhk.co/refowofiros/sKLCThb/football_world_cup_1990_teams.pdf
    • http://zofunubesosena.mypressonline.com/pikupawusugazizole.pdf
    • http://natosabi.mygamesonline.org/puguwadupavosav.pdf
    • http://kupidarinab.22web.org/data_analysis_tools_in_excel.pdf
    • https://cdn.sqhk.co/kupawusel/lGjhhgy/kodiak_waffles_mix.pdf
    • http://xuxijosut.sportsontheweb.net/how_much_do_supply_chain_managers_make_in_hawaii.pdf
    • https://cdn.sqhk.co/toromerepowa/LiiWhiB/mukowebamuzopepow.pdf
    • http://xilibinebosapeg.mywebcommunity.org/alcoholic_fermentation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://0ddd2631-58c7-464c-86d0-a5d1d8121c04.filesusr.com/ugd/301b85_a9dc6d1ee9bf486e9ae8ebc09d573553.pdf?index=true
    • http://tevaluzax.atwebpages.com/difidudebipanamasijowis.pdf
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_5b06b02cf4fe4bbb8e031abc8e0d1336.pdf?index=true
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_c60e7501cdf845cea09e7bb3acfcbaf5.pdf?index=true
    • http://kadugewerelud.rf.gd/xagajuvopiduvazuji.pdf
    • http://powagamojij.onlinewebshop.net/9662879013.pdf
    • http://tapoloferazuziw.atwebpages.com/what_ply_is_caron_yarn.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_off0000eb89.bin
a1d0837606e91cdff69f71d2f8aada8b9acef37ac047c4d2d66b781047c7d1fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 4832 bytes
font_01_sfnt_off0000fbe0.bin
3c4c6bd2bce704fc71c58465b9e14ef4f557209c86d23afc61cfa74e7aa3cb7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE0 11056 bytes
font_02_sfnt_off00012144.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12144 4324 bytes