Malicious PDF — malware analysis report

Static analysis result for SHA-256 e625919c39519b40…

MALICIOUS

PDF

80.4 KB Created: 2021-05-06 01:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b523b8011ae85b1cd413daa69c2d5ff8 SHA-1: ab886f4d389f54fc897964ffb293b7334c2f0428 SHA-256: e625919c39519b403744e31de8b2152180b792029e3fe1c1f9a760141fd37737
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. The primary URL, https://maypoin.ru/strik, is likely a phishing page designed to trick users into providing sensitive information.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=harry+potter+book+8+movie PDF link annotation
    • https://cdn.sqhk.co/baruduwege/ChjBUjc/valgame_dios_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/hcihigo/sedige.pdfIn PDF document text
    • http://dvestideyli.xyz/schlage_camelot_entry_door_handle6dbzo.pdfIn PDF document text
    • http://shopyou.online/how_to_use_garmin_gns_43099sn6.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/UidMmhs/marble_bubble_shooter_3d_game_app_download.pdfIn PDF document text
    • http://lnstagramcentre.net/best_frozen_drink_at_dunkind6xzy.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/jjUjjjc/77621181601.pdfIn PDF document text
    • http://bigwin-1xbet.fun/silence_of_the_lambs_book_seriesp941r.pdfIn PDF document text
    • http://vodoroding.info/304144682540l0ti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/xizuxanaxolanerifipe.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/gsu_math_placement_test_answers.pdfIn PDF document text
    • http://zarevarepi.epizy.com/78717667244.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/what_is_penal_system_theory_in_nursing.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_cb12586141c444c38c79bf4062541f3c.pdf?index=trueIn PDF document text
    • http://kuwixogup.rf.gd/65_bpsc_question_paper_2019.pdfIn PDF document text
    • http://mipaduverututus.rf.gd/lokedimujebevor.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_ff99f03902324eb89ca5bca71f044c45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safago/36809484483.pdfIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_03a9c54557c24411b88fae504d2dec90.pdf?index=trueIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_b3bcaafc939a451aa4236ade9ac1237e.pdf?index=trueIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_d20554e96c8a420585d1ecdbdf12d8ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusixa/adjectival_phrases_exercises.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_ba994110735648d8818bba5e8de8fafe.pdf?index=trueIn PDF document text
    • https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_6c34446fa04f4088a624205662df55d7.pdf?index=trueIn 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_off0000fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 5276 bytes
SHA-256: 1aeacf53389f02b8607bd9db32c850604749412fd0e97503a9fceae27a182dd2
font_01_sfnt_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 10668 bytes
SHA-256: b8a58fdc630dfc86e6682eb002982bcb29e3d224594fb3acef4eba269424a058

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