Malicious PDF — malware analysis report

Static analysis result for SHA-256 685ff955984cd1e9…

MALICIOUS

PDF

100.1 KB Created: 2021-03-08 20:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: bd1fb21f05c158f54382ad56b1bce66a SHA-1: 5d2b0397acf8086eccad60056ff36080ee9b799b SHA-256: 685ff955984cd1e9eaae0fbb75c9344d552c829bafbf96e76446896fe995bbfd
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links, including one to 'zajinet.ru', suggesting an attempt to direct users to malicious websites. The document's content, though partially garbled, appears to be a lure, possibly related to fishing reports, to entice users to interact with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://zajinet.ru/123?utm_term=florida+west+coast+offshore+fishing+report PDF link annotation
    • http://momarivido.mypressonline.com/final_cut_pro_x_free_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_601610020f9af.pdfIn PDF document text
    • http://fovuvizoge.22web.org/64828343438.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/anatomy_and_physiology_colouring_book_for_nurses.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/bIjjvkz/worivusinepulagafit.pdfIn PDF document text
    • http://copriyghtconfirmed.com/ralodune7r35n.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/how_to_fix_a_noisy_insinkerator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_601fc7499a077.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/wutimin.pdfIn PDF document text
    • http://dom-bita.org/odessa_tx_cdl_jobspxpft.pdfIn PDF document text
    • http://makeyourself.xyz/4124884973hs79m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_60413ec2ec68c.pdfIn PDF document text
    • http://menformula.xyz/sophia_fowler_gallaudetvuh0s.pdfIn PDF document text
    • http://raifaisentapp.online/texuridihitet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_5ffa4fee31ad9.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/8gijjgi/anime_character_maker_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_6022625746f64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nojikigor.myartsonline.com/what_are_some_key_features_of_a_commedia_dellarte_performance.pdfIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_df59b6f9dfa94b6da3932ba88942ffc6.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_3151ae4d404748ab8b623b3e3fda83ec.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_104e6b40e951490b81f01673d3e1e481.pdf?index=trueIn PDF document text
    • http://vanudedu.epizy.com/wanted_poster_template_in_french.pdfIn PDF document text
    • http://wubulinefoz.rf.gd/music_notes_symbols_and_names_and_beats.pdfIn PDF document text
    • http://gezibetaw.epizy.com/wozimimakofepudiro.pdfIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_49dd46feecfa43efad0587258cb8bf6c.pdf?index=trueIn PDF document text
    • http://xadezifu.rf.gd/chartered_accountant_certificate_format_for_income.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_off0001480a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480A 5464 bytes
SHA-256: ecd02ee5d97153212771c4bc74fba967282f8779d367ed4df98a9d29c55a4dd1
font_01_sfnt_off00015ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AB0 11760 bytes
SHA-256: ed756ddf2893e33c10bbee4894ffa51174ca8acc645bf7cd8f051aa531d89f7e