Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df60476a54bbf90…

MALICIOUS

PDF

80.2 KB Created: 2021-02-15 16:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50715591082625e124bc2ee01becc6c0 SHA-1: 165dfd3603ef552d4256a8e0c30c66fec8c4951e SHA-256: 7df60476a54bbf903f5d492df1b6fb5904e7d572b47223f8d9a0fe3e5048e580
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://crophysi.ru/strik?utm_term=how+to+read+library+of+congress+call+numbers PDF link annotation
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/tulazovitisowoju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476122/normal_6006d5a92ac68.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/XibhjT4/beautiful_flowers_wallpaper_for_iphone_6.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/dijGgjq/movie_maker_project_omzetten_naar_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/jAgg73j/severe_ear_pain_in_adults_home_remedies.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/ifMrszy/63364176730.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/9516390.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/jjXaGgh/epic_games_free_games_list_august_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/tnlTjfH/67049874706.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/ehihcjC/70419780958.pdfIn PDF document text
    • https://jukosixosibi.weebly.com/uploads/1/3/1/8/131871462/0017c6863f81f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387060/normal_5fe1c9fb40df2.pdfIn PDF document text
    • https://zitudoxe.weebly.com/uploads/1/3/1/4/131437236/wabitamoni_nibir_sepero.pdfIn PDF document text
    • https://cdn.sqhk.co/dirujigowag/Tp3hihd/fast_food_near_me_open_that_delivers.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/gdCcTrc/dukegaruvorixogovotuwoken.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/silubebebefuju/criminal_background_check_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/macaronis_resort_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/amharic_bible_commentary.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_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 5516 bytes
SHA-256: 47aa4de30bdc3bfd50601319dcc30388c20e905beb821b7b2e1e38a8580bb134
font_01_sfnt_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 10712 bytes
SHA-256: cfa41fc7d352da3eaa8b7fa77683fc6808893c344f7233bb2096d96bf0d0c057
font_02_sfnt_off000124bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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