Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e02be5d75ef3d4…

MALICIOUS

PDF

78.2 KB Created: 2021-03-19 11:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfefb5ce400e735ea698cb876f4f5199 SHA-1: 32917f44a8ece43e9ccf04ea6d9dd9647c03e8d0 SHA-256: 42e02be5d75ef3d441ec6cce8fe004f313c4aad1fb10e93cf2403fc8d1d51574
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to technical support or error codes, directing users to external sites. The presence of numerous links on disposable hosting further supports a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=samsung+ductless+split+error+codes
    • http://reduslim-buy.site/labilonofopamugatidajiguzgj64x.pdf
    • http://about-igsupport.com/98063274798bsvcw.pdf
    • http://kivudutamazawan.22web.org/invoice_template_australia_ato.pdf
    • https://cdn.sqhk.co/koletexun/DihcgE2/cross_wallpaper_iphone_5s_original_hd.pdf
    • https://cdn.sqhk.co/gadowikuxe/SWhdTjj/pick_me_up_3d_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_8fb4d8931ee04a398a6de1fbd58baecf.pdf?index=true
    • http://lefulevalo.epizy.com/piwifiviloz.pdf
    • http://towixamum.epizy.com/ganpati_bhajan_marathi_song.pdf
    • http://putojeferef.rf.gd/edit_files_free_windows.pdf
    • http://wenelorilagorim.epizy.com/xujezubadasovosaxepelo.pdf
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_0c6f7fb2ad004b86bd4d323a94704105.pdf?index=true
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_610e89bcded14fe88f61cad3a9c4c8ee.pdf?index=true
    • http://nibedob.rf.gd/frigidaire_-_retro_1.6_cu._ft._mini_fridge_-_coral.pdf
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_562a6976f6924332b07da73fe6e28269.pdf?index=true
    • http://pirarotuweze.rf.gd/fobigilo.pdf
    • http://pipopax.epizy.com/condensadores_en_serie_y_paralelo.pdf
    • http://netozovozuze.rf.gd/35504627175.pdf
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_c629f738d1db450ba5c02c71196256fd.pdf?index=true
    • http://piwisivajefi.rf.gd/85024854137.pdf
    • http://kavejanunar.epizy.com/cours_arboriculture.pdf
    • http://bojivudotafaf.epizy.com/birds_of_passage_2018_parents_guide.pdf
    • http://regadozemi.epizy.com/21352346995.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c1.bin
e3ee58083e7440e5c43d4f56940cd5933e28f392953115200bfc0399a602e07c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 5496 bytes
font_01_sfnt_off0001055e.bin
c3fade95852cf25c7ac5ce45809555389f314abf721637f60c4ae1ff10a4dcd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1055E 11204 bytes

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