Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb620b4189597bb…

MALICIOUS

PDF

79.6 KB Created: 2021-03-07 03:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fa93640a8e948a72d2d3aa1b90eea6d7 SHA-1: 9cc909dac70d9c40058390fe45357130726f9bdd SHA-256: deb620b4189597bb33c313426d8b2e98e3c47ed841be2e29be854dca4a924b40
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://pelibifir.ru/wix?keyword=inventor+exploded+view+2020 PDF link annotation
    • https://bofuvuwowu.weebly.com/uploads/1/3/1/8/131856225/abe1d774808.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/fibjhje/tawanuvelelulojizusivoz.pdfIn PDF document text
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/zakujadar.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/ibnjwwY/lava_run_parkour_minecraft_server.pdfIn PDF document text
    • https://robugagemo.weebly.com/uploads/1/3/5/3/135304688/b90799363511a7.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
    • https://s3.amazonaws.com/guxosa/it_essentials_checkpoint_exam_answers_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/sweatcoin_hack_ios_apk.pdfIn PDF document text
    • http://leperipuf.rf.gd/aufgabenpool_mathematik_bhs_formelsammlung.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/blood_clot_is_forming_after_tooth_extraction.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/bahubali_2_picture_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/76751111959.pdfIn PDF document text
    • http://kurujabarufuxe.rf.gd/davudurezarenidefejizal.pdfIn PDF document text
    • http://vasedazixi.rf.gd/18416346655.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/hashar_full_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/why_is_my_mouse_always_right_clicking.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/spotify_url_er_online.pdfIn PDF document text
    • http://jifumowujawot.rf.gd/linux_for_dummies_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/fixasikivepa.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/aquatic_therapy_exercises_for_knee.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/challenging_calculus_problems_with_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/cartoon_network_gba_games.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_off0000ec8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 4784 bytes
SHA-256: ce0bf7b8184f12f655fa6a87f427747cf1a2fa33f53c92054db2dc818bb85b94
font_01_sfnt_off0000fcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF1 11092 bytes
SHA-256: 04a3bf11d7d64f4262caa0b0020219335bc9ae47b38a6fa64294ac57535ac4da
font_02_sfnt_off000122ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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