Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6d3ffdd804c36b…

MALICIOUS

PDF

79.9 KB Created: 2021-03-01 19:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 414c305ea936226b415c32737040727b SHA-1: a5b31e38c35d882bfd6cb46fb7d28c4a13e41a07 SHA-256: ca6d3ffdd804c36b64b00d74b53c8942792ce09e1235ff64cabe3243b885470c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=the+go+to+strategies+project PDF link annotation
    • http://myfavoritesun.xyz/jowazupifuruxawrlj.pdfIn PDF document text
    • http://olymp-trade.top/knights_village_warwick_castleibqzy.pdfIn PDF document text
    • http://medtechnika1.ru/jump_rope_plank_workoutdi1nj.pdfIn PDF document text
    • http://radasekot.iblogger.org/escape_plan_full_movie_free_mp4.pdfIn PDF document text
    • http://nunixofu.22web.org/look_up_child_piano_sheet_music.pdfIn PDF document text
    • http://bestgirl69.com/sidujavepomulopazaogno.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/lirumurelokizinofevefap.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/womoverujutotuderifofed.pdfIn PDF document text
    • http://dithetsen.xyz/sense_and_sensibility_moviey1hlc.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/things_to_make_and_do_in_the_fourth_dimension_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/cxhf7gj/plasma_glow_discharge_structure.pdfIn PDF document text
    • http://magonimiw.iblogger.org/tadasovutitebikalutebalub.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://mafakizukizunof.epizy.com/how_blood_is_formed_in_our_body.pdfIn PDF document text
    • http://kivekedifewu.rf.gd/bexumevimosag.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/97791627926.pdfIn PDF document text
    • http://jesebikalag.epizy.com/64080178929.pdfIn PDF document text
    • http://pekotezubefem.rf.gd/tower_defense_king_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/graphic_design_website_free_templates.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/tixerevotajeb.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/awards_for_all_scotland_application_form.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_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 4868 bytes
SHA-256: 0c028d993d2914e3347a38ea84b1cdf1f20d79e90e10c9ecabad9efdb35f5ea0
font_01_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 10876 bytes
SHA-256: 920b8480deecc3c85f274c9914fd6d93c66c9562afd3992446c47402d3297de3
font_02_sfnt_off00012446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12446 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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