Malicious PDF — malware analysis report

Static analysis result for SHA-256 c843a028d8807531…

MALICIOUS

PDF

80.8 KB Created: 2021-03-14 01:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 01ea2c2d24fc85edabac8fe117ea1f60 SHA-1: 6ac82d69f27e111b0f1e1733200a28c413cfef69 SHA-256: c843a028d8807531a64f3d551c0e8d64b5aa75f4ae5f8521921daba0167cbf56
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to legal agreements, likely serving as a lure to encourage downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://vilenefex.ru/award?keyword=sales+agency+agreement+template+pdf PDF link annotation
    • http://lovechat24.club/dope_background_iphone_6nlq07.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/astrology_books_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/iiQdhj1/xepimobazatosapaxagozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_5fd66372e87e0.pdfIn PDF document text
    • http://gadalonevuv.iblogger.org/furasezasonarureze.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/6ZBheX0/microbay_golf_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/eV4iaid/alien_arcade_game_rom.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/58223255806.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/d0gjnhi/english_dictionary_offline_free_download_for_windows_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_6016d1edf3b2a.pdfIn PDF document text
    • https://futokiwusilo.weebly.com/uploads/1/3/4/4/134458686/radexiwopala.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/E7pgdR3/47816717338.pdfIn PDF document text
    • https://titerafutar.weebly.com/uploads/1/3/0/7/130775646/26345d88df4d.pdfIn PDF document text
    • http://submonster.xyz/44307552943qkdxm.pdfIn PDF document text
    • http://miwopejodap.iblogger.org/36081091042.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/assetto_corsa_drift_modsx5aoy.pdfIn PDF document text
    • https://tefafovok.weebly.com/uploads/1/3/4/5/134588422/d672c.pdfIn PDF document text
    • http://letxxnx.org/dudusebuwoleweberanedatuwnkpc.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/bowevukejonuziviwa.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/1079343.pdfIn PDF document text
    • https://fokubazukif.weebly.com/uploads/1/3/2/6/132683137/679a37de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zifelibuvofaz.epizy.com/different_types_of_electrical_wires_and_cables.pdfIn PDF document text
    • http://nibudikugi.epizy.com/8392386241.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/zefafesuboxaruxojoxobele.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 5680 bytes
SHA-256: 06b49cefd17eb9946575b63bfada6633d2b14f8d02ea13cc501902ac7b39701f
font_01_sfnt_off000110c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 10748 bytes
SHA-256: 44fa963d4156159f22147ee4506cae9806b7f03185db3cbf9d6c51fa147588ae

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