Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d5d64c1b51b87d…

MALICIOUS

PDF

91.2 KB Created: 2021-04-11 01:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f2a82c89b7e066929dcce882c99cc09e SHA-1: d64bbdd0e0c57c924a91625f5b44ff183f76dc30 SHA-256: 54d5d64c1b51b87dc559c9ff8d0e676a239acd3965880e532a0785f2198b64db
126 Risk Score

Malware Insights

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

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 0.9998

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://ponafet.ru/strik?utm_term=the+missing+season+1+episode+5 PDF link annotation
    • http://niwopofe.scienceontheweb.net/86923885082.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/Mf7Hifq/android_mobile_ringtones_free_download.pdfIn PDF document text
    • http://belldiscount.ru/roadmaster_granite_peak_womens_mountain_bike_26_wheels_black3idls.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/80054577097.pdfIn PDF document text
    • http://levantegroup.net/how_to_write_a_hook_sentence_for_an_argumentative_essaypnlfc.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/9604720143.pdfIn PDF document text
    • http://obuv-kozha.ru/wd_tv_live_hub_media_player_firmwaref7vr8.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/27949257158.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/joheOif/race_time_predictor_from_vo2_max.pdfIn PDF document text
    • http://oneplusonemain.xyz/90240088092kj5re.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lolunoxij.myartsonline.com/nacionalismo_significado.pdfIn PDF document text
    • http://zovoxasus.rf.gd/manualidades_de_papel_higinico.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/gekubemegugora.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/word_puzzles_brain_teasers_worksheets.pdfIn PDF document text
    • http://zogakule.rf.gd/aliexpress_online_shopping_apk.pdfIn PDF document text
    • http://bafutosuxaki.rf.gd/xudaxedesutozesave.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/newoko.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_off000123a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A9 5368 bytes
SHA-256: ecd274dda23bcbef6e9f2c2527293a826ffec04abcd4a0dcefb7e7939a6c2f7a
font_01_sfnt_off000135d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D0 12428 bytes
SHA-256: 04cc204fdb61b3dbdb887685c69edbaf5c0126c8fd664ad69d99a538ee1af6d5