Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ee6415411356b3…

MALICIOUS

PDF

81.5 KB Created: 2021-02-26 01:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 579358fa7c98b385840a33c5df31121d SHA-1: 75bb33de68f2c582a7aae8a37b563c14ee273fe7 SHA-256: c6ee6415411356b33469e144774919cc59a9192226a7cda90fd88f8702af3ee0
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to potentially harmful content.

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 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://seumenha.ru/award?keyword=does+silk+almond+milk+contain+carrageenan PDF link annotation
    • http://edayafar.xyz/yellowstone_season_1_episode_5_trailergj675.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/jOhcHZ6/33302068740.pdfIn PDF document text
    • http://appletopshop.ru/csgo_commands_for_1v19n941.pdfIn PDF document text
    • https://danivuzi.weebly.com/uploads/1/3/2/6/132681213/c509024df3486a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_602d4a809717b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_60159ca75821b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fe5b7c9531c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_6033bc52d7d5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5fef558094545.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/jbBgUmB/bakibaxokixabibem.pdfIn PDF document text
    • https://cdn.sqhk.co/tuparesoxaj/jj4shgg/4966516012.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/what_does_time_and_space_mean_in_a_relationship.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/gozapo.pdfIn PDF document text
    • http://kelnoteres.xyz/blanket_cover_sheet_cheapbi72k.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/lusegokaves/wazirewofedisefokabi.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/pobaz.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/aambala_movie_audio_song_in_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/hey_duggee_birthday_cake_template.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_off00010228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10228 5320 bytes
SHA-256: e351b48379f451d7339b6cdfcb757a269c7170198ba1c9caf0778b9c47ebc1ec
font_01_sfnt_off0001142d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142D 10644 bytes
SHA-256: 36a9f114b7b945880a09b65385918a1e58f3908a2c5832c46fda1f967645bc10

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