Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd738a62025de8bd…

MALICIOUS

PDF

87.4 KB Created: 2021-03-23 00:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2b7a4023a875d45cc5d899c9bc98ca2c SHA-1: 94d4b5b88f129a86ecc8d847cac80ea1b403e7ef SHA-256: cd738a62025de8bde319a80fd8c3beec724467b08063bf1e2d0a6eaf1d56fb5b
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/strik?utm_term=sony+dvp-sr200p+parts PDF link annotation
    • https://mavevataxivira.weebly.com/uploads/1/3/4/6/134600118/xefelulosadovaxax.pdfIn PDF document text
    • http://fozujam.iblogger.org/what_do_you_call_a_chinese_warrior.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/tipewemubu.pdfIn PDF document text
    • https://govubazidexifa.weebly.com/uploads/1/3/4/3/134342639/pepudojivibi.pdfIn PDF document text
    • https://tipureroxagojox.weebly.com/uploads/1/3/6/0/136096040/vorajipakutomadurow.pdfIn PDF document text
    • https://mabamakozipapap.weebly.com/uploads/1/3/4/3/134315796/webuwi-romopu.pdfIn PDF document text
    • https://vemisalisak.weebly.com/uploads/1/3/1/4/131437925/vujeliwiso-lefezexi-lewijuximejuwel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_34f58b06a4074ad3beb92fc0bf2a752f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/vegeku.pdfIn PDF document text
    • http://zaximibirada.epizy.com/wellness_kitten_wet_food_feeding_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/kitab_bajuri_jilid_1.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/descargar_libros_de_apologetica_cristiana_en.pdfIn PDF document text
    • http://wufejupixixot.epizy.com/boy_scout_store_tucson_az.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/change_to_word_doc_mac.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_1e23d06a636940a19fec4490c69e354e.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_05010e7d80634ef6833f4ee5c9f3494b.pdf?index=trueIn PDF document text
    • http://tibelobal.epizy.com/jaforosu.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/5607163982.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/popular_old_black_gospel_songs.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_29efbcea1aa84bfcb798375c9c37649f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/nakixidipijam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 5492 bytes
SHA-256: f8c03ed4fc46ff236ca1cabd6ac062a02acbf291ee6e0e3406921248050f5da6
font_01_sfnt_off000112a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A8 12588 bytes
SHA-256: aed92e525b8b36265b89ba0969abb4e56e5245a116725d624ab4a90f01e0f814
font_02_sfnt_off00013b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1D 16068 bytes
SHA-256: 12bdfdd26b42687ed6d6e4673084773943fc64d80ea302008a05158b1f99f3df

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