Malicious PDF — malware analysis report

Static analysis result for SHA-256 748dcef628895543…

MALICIOUS

PDF

65.5 KB Created: 2020-12-24 05:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4d742208d5097a7a625e99241b147c59 SHA-1: 90850887485ae90053665b0f74531bee8e8b4bd9 SHA-256: 748dcef62889554317bb7bbb59359d4553bfbc8abc8fccdac338f28693dc9cba
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?utm_term=origami+flower+tutorial'. This URL is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is sufficient to classify this as a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/strik?utm_term=origami+flower+tutorial In PDF document text
    • https://cdn.sqhk.co/merodobiweve/6eaVzgd/hot_wheels_super_ultimate_garage_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/hfeheib/final_fantasy_record_keeper_characters_release.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jdhd1Ah/jazulinuzipakutelobe.pdfIn PDF document text
    • https://cdn.sqhk.co/xowuzaseku/iiBicap/cover_orange_gameplay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/05308f6c-34eb-4ee0-950f-8751ac8631de/simpsons_tapped_out_donut_hack_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a51df0e-34e0-4a7d-be36-fd0b1dda275b/vanilla_wow_engineering_pvp.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/ayesha_jalal_the_sole_spokesman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd23b06f-cfb3-4a8a-bde1-2ea9c1ef2262/aye_axemen_orientation_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24da9f0-9654-4ca4-b77a-bfc67e64b032/barirotodakiwuxoworugug.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/st_vincent_de_paul_thrift_store_auburn_wa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f96bcff-4883-41d1-a836-b694a299a373/descargar_apk_de_tubemate_para_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a75bc2-da83-4ca6-89a1-f1584fc1839c/97340631710.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/61218419326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1bc161-dca7-4ef5-b511-1c24e53bab80/pixel_car_racer_mod_apk_download_2020.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_off0000c4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FB 5028 bytes
SHA-256: 3753977acbd4fd259e6ffa7c847a2f12092a3630eb0ca842d8020afe0aba2440
font_01_sfnt_off0000d613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD613 10340 bytes
SHA-256: b88df88a741a2b45e51896b24bd396a1ce05da371153fb930845418fe19d816d

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