Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ee1d05896fc504…

MALICIOUS

PDF

77.5 KB Created: 2021-03-11 00:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1afffe71e270f4a15fd11a13b8a2651a SHA-1: cf64da1cf4199ee4206d4b5272949dcb36c24255 SHA-256: 50ee1d05896fc504824d93e4bb7db5bf0aae24627c0a33a881da0cd592d0e86d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI links and a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=common+app+transfer+college+official%2527+s+report PDF link annotation
    • http://lnstagram-help-businesss.com/reported_speech_statements_exercises_docl8ctj.pdfIn PDF document text
    • http://itwow.info/18100569526qb7hx.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/PHnchaW/xebilemawuwisat.pdfIn PDF document text
    • http://apparently-home.com/dumajenixosozavinareoq0.pdfIn PDF document text
    • http://tublitalia.space/goodbye_deponia_trophy_guide_and_roadmaptcxzc.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/asko_d3112_dishwasher_repair_manual.pdfIn PDF document text
    • http://lumacy.site/34791994159u547s.pdfIn PDF document text
    • http://kmplitka.shop/star_citizen_ships_prices_most_expensivekpchh.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/fokerofigexuxuja.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/ejghfha/zagazugezulegilugepinar.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/hhhccjf/barogerevemopenowegare.pdfIn PDF document text
    • http://retys.fun/farmall_super_avqu30q.pdfIn PDF document text
    • http://svoydvalend.xyz/sony_android_tv_vs_smart_tvxafk6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toguvaju/mudelimujawududolebawejan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863e8974-a670-4deb-b7ff-4355067367bf/josefazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88dacd37-41fe-4795-a1b9-922c29baec7a/bakeduwozekuvutirokazewem.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/kewawisenev.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/nemomivevojubes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb69743-1521-4180-b2d0-f5b2996c1661/interview_with_the_vampire_armand_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/36693790931.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/printable_brush_pen_calligraphy_worksheet.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_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 5272 bytes
SHA-256: 9ab0c78dee99aea17d6b8af2054d658ab119b44158cfcc7f791676a290d98530
font_01_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 10688 bytes
SHA-256: b3af91de369b967ebc476139eb831f81ab482a4b9bf91455c55cd5b8efd92def

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