Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6d33f5a10a7c67…

MALICIOUS

PDF

70.0 KB Created: 2021-03-18 08:07:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5435f44930505596961e3e96d1402bf9 SHA-1: 4363cc2ed34769da1bb2fac9928d69c34f998ab0 SHA-256: 1e6d33f5a10a7c67210c0fbf200a7c314ee9fe019b2fc06829853f75bd23f308
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. One of the primary URLs, 'https://xajibur.ru/wix?keyword=roblox+hotel+logo', indicates a lure to attract users searching for specific content. While no scripts were explicitly extracted, the PDF structure and extensive link farm are indicative of malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://xajibur.ru/wix?keyword=roblox+hotel+logo PDF link annotation
    • https://vuguzunorofina.weebly.com/uploads/1/3/4/3/134322364/tabatizuvesufepolam.pdfIn PDF document text
    • https://cdn.sqhk.co/welosezu/aQjBjhk/62787945095.pdfIn PDF document text
    • http://vulomufukuvi.22web.org/hollywood_movies_in_hd_sites.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/gZidZji/white_cardboard_sheets_for_crafts.pdfIn PDF document text
    • http://tolisona.iblogger.org/how_to_change_the_time_on_a_kenwood_dpx500bt.pdfIn PDF document text
    • http://gedobitubojufu.iblogger.org/zonobigugeluluxatab.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/zewodotixuxogesen.pdfIn PDF document text
    • https://dojudetokin.weebly.com/uploads/1/3/4/6/134613144/a5921544.pdfIn PDF document text
    • http://lumapon.iblogger.org/76949162656.pdfIn PDF document text
    • https://niguzagum.weebly.com/uploads/1/3/5/3/135390192/2727161.pdfIn PDF document text
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/jizatob-binoj-wusuboposi-lipajitake.pdfIn PDF document text
    • https://cdn.sqhk.co/kinirebuseva/TZjffgh/lego_star_wars_battles_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tozuduxaxikagik.rf.gd/44489038166.pdfIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_55097c3ab87f414585768c93bf4b66bb.pdf?index=trueIn PDF document text
    • http://zafagizidop.rf.gd/380597681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e95ad84-0d67-4d83-a528-895261e87d6d/little_red_riding_hood_movie_cartoon_youtube.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_9dfe99c1974d4cba9f9f66348394809c.pdf?index=trueIn PDF document text
    • http://sulegezusaz.epizy.com/17011967880.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_11cda9f4025b4672914b93ed0c6b9a50.pdf?index=trueIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_1d761ff1f9924290abb888c1e64fc0b6.pdf?index=trueIn PDF document text
    • http://dixasimoxipux.rf.gd/hp_officejet_pro_8610_adf_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8731f83f-dc15-41cd-8b1b-aa7bb0ccea00/honda_xrm_110_engine_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb42d05d-c522-4048-9723-c9ce6f2b0efa/4_pics_1_word_answers_8_letters_red_carpet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eec529b-af7c-4880-9c50-98501435c84a/43509947541.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_off0000d646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD646 4676 bytes
SHA-256: 542c53ca2d67eaab6f782ec480cdaf435806a02c978825f285b0e699d7b2d794
font_01_sfnt_off0000e63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 10200 bytes
SHA-256: 4c3f3b5b1c9623474863106060a985b31ef7697f7713125de68ca6bc19034f61

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