Malicious PDF — malware analysis report

Static analysis result for SHA-256 52fa18891419b490…

MALICIOUS

PDF

74.6 KB Created: 2021-03-07 04:21:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0207b0fff3682383bb736e13b86a4aa7 SHA-1: 0e506f6192efb1d17af677f91b768866971fc377 SHA-256: 52fa18891419b49086afb2c840177bc02f188ea92e621de91deb9a833214f990
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, and one of the primary URLs is 'dugedepap.ru', which is suspicious. ClamAV also detected this as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the document structure and URL patterns suggest a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/aws?utm_term=what+is+the+4+digit+code+for+a+sanyo+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379030/normal_602d811e9784a.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/kesujegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5fd79780b99b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456989/normal_60070651c8b87.pdfIn PDF document text
    • https://mudasolujo.weebly.com/uploads/1/3/4/8/134886274/04a879a78c52.pdfIn PDF document text
    • http://bukapim.mywebcommunity.org/navozowowilap.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/f6hboWj/adafruit_audio_fx_sound_board_2x2w_amp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417669/normal_6014910a248a7.pdfIn PDF document text
    • https://cdn.sqhk.co/dokijesu/gcQxCEd/bubble_shooter_puzzle_apk_download.pdfIn PDF document text
    • https://kotevopokevunab.weebly.com/uploads/1/3/4/5/134590751/78a30f50a1d3a.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/timinudeg.pdfIn PDF document text
    • https://cdn.sqhk.co/warugariluxe/cidgjfu/2712311348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_60351cc3bbe4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370278/normal_5fe0614a65927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368485/normal_6009a0c70d5ff.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/sewamos/mibobapixitegonisuj.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/cellular_respiration_an_overview_worksheet_answers_pogil.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/masovigegab.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/what_does_stand_down_mean_in_the_military.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/blood_diamond_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/wezitobamujiw.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_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 5512 bytes
SHA-256: 1dc602a47396e17908302290fcfd985274bac4dc45bfaa8ec0211a5719610f6a
font_01_sfnt_off0000f9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 10440 bytes
SHA-256: 961c22daa8211a9aaeb222e7d5d56de41a147c09ffcf968f92deaa69da2fd539

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