Malicious PDF — malware analysis report

Static analysis result for SHA-256 9125350de605940a…

MALICIOUS

PDF

98.2 KB Created: 2021-02-26 21:15:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 465cab1f452bb1c0e60bbff253e726fc SHA-1: 6f774cfb4cfac9f5ed4dee8918975bd6406147d8 SHA-256: 9125350de605940ae949bbfd08759b62c3fdde22546bb3a88c2e6f339a64b122
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to file conversion, which is a common tactic for phishing or malware delivery. The presence of embedded URLs and the link farm heuristic indicate an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wb?keyword=convert%20word%20to%20excel%20online%20nitro PDF link annotation
    • https://cdn.sqhk.co/jobiwokojo/gUUhegf/samsung_galaxy_xcover_4_test_water.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/61059561230.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/Cigidgc/irish_motorcycle_road_racing_championship.pdfIn PDF document text
    • http://luzepusi.iblogger.org/free_wedding_return_address_label_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/hcFhhNQ/70276245759.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/hyxyEkQ/jumpstart_mtg_box_price.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/7idYhi6/general_electric_stock_today.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/38371859080.pdfIn PDF document text
    • http://namibav.iblogger.org/sagowawux.pdfIn PDF document text
    • https://cdn.sqhk.co/lexuxeza/bahfSks/asphalt_nitro_online_mod_apk.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/22131449199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://midofel.rf.gd/how_to_turn_on_a_toro_snowblower.pdfIn PDF document text
    • http://pimisigejofal.rf.gd/airliners._net_trip_report_lufthansa.pdfIn PDF document text
    • http://bitesokilok.epizy.com/63890453225.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/9093015940.pdfIn PDF document text
    • http://fujebaxe.epizy.com/11804041404.pdfIn PDF document text
    • http://liwumakagizir.rf.gd/befizedumafeg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13738 4576 bytes
SHA-256: 5ac928521cf273b9d466cbdc2276b4215ae059a5396fe629a84d61755b61b0a5
font_01_sfnt_off000146e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E2 11304 bytes
SHA-256: 134f2035c8c173a953b4ed2e9053603f282a944139c6ead99622770257be8d89
font_02_sfnt_off00016d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D44 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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