Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0eb636d7e2b80ff…

MALICIOUS

PDF

79.9 KB Created: 2021-04-10 05:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2c10b1f2649cfc742cbbd9ce1ad16faa SHA-1: 5513c19ada8e33cf6423e2b8c3910c3cf61524a5 SHA-256: e0eb636d7e2b80ffb9cf97adb36d51ba6739849e6381acfffca0df94a8dc9327
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized PDF files, indicating a link farm or traffic generation scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

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 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://fokemale.ru/strik?utm_term=movies+similar+to+the+lady+with+the+dog PDF link annotation
    • https://cdn.sqhk.co/wepurodapike/jicihhy/wish_wash_meaning_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/berovanova/ijhqQhe/how_to_make_a_spiral_rainbow_balloon_arch.pdfIn PDF document text
    • https://cdn.sqhk.co/fozozumaj/gjhc2h8/stock_market_live.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/GhjEoja/cheap_flights_to_las_vegas.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/dibRhjj/mimpi_digigit_ular.pdfIn PDF document text
    • https://cdn.sqhk.co/suzironanes/hGgjbvN/gojirefisinuti.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/jdVge7d/live_video_call_app_for_android.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/trinomio_cuadrado_perfecto_ejemplos.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/functional_group_isomerism.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/HeVjejf/jujituragozezafajuzojazaz.pdfIn PDF document text
    • https://cdn.sqhk.co/tenotitur/ghKdhcc/on_my_own_les_miserables_lyrics_karaoke.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/icghtjd/safiso.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/c0gijfb/gimar.pdfIn PDF document text
    • https://cdn.sqhk.co/kulamogo/4Plhdji/youtube_to_mp3_app_iphone_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/SheIijC/zosumupev.pdfIn PDF document text
    • https://cdn.sqhk.co/tizuvuwo/9hfDaja/dinghy_for_sale_michigan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_77dd013d877e453f9eca7d9323ce8aa3.pdf?index=trueIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_b0ace114af9243de98592b83d49041b8.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_027f328d9e10496a8e5bb70796f1e8d3.pdf?index=trueIn PDF document text
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_3f7c806bcf054bb498e626fd4187ccde.pdf?index=trueIn 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_off0000f785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 5496 bytes
SHA-256: cbb3344be652d929db9f96ec629ef9ed52f9525e179532c53f8e6c81ca9649f2
font_01_sfnt_off00010a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2F 11108 bytes
SHA-256: da06520959a77f519f568b861461a81c3c6603df7bbf1ca7cd4889ebc4167e03

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