Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e12fedda4a88c69…

MALICIOUS

PDF

85.9 KB Created: 2020-12-04 02:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a2bf35cc9ae3ea3d5ce74e1196bb39ce SHA-1: 74068f5fd9f735e1e6a1f3f320465122c49cd75a SHA-256: 2e12fedda4a88c6926108bc95806f603ab94a2cd17d39aa5fe6e47ec07ec52b4
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm'. The ClamAV detection and ML classifier strongly indicate maliciousness. The presence of embedded URLs and the 'SE_DOWNLOAD_BUTTON' heuristic suggest a phishing or social engineering attempt to trick the user into downloading further content, likely malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/123?utm_term=in+a+competitive+market+with+identical+firms+quizlet PDF link annotation
    • https://sifidapive.weebly.com/uploads/1/3/4/5/134526041/f4416859986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_5fbb12d065687.pdfIn PDF document text
    • https://sonalopuxarore.weebly.com/uploads/1/3/4/3/134310538/1532f7849a5677.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/woxewiwupir/check_book_form_sbi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b069403f5353fdb64a54/t/5fc97232c8e99239e003d8ee/1607037491169/67797228703.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd01e13fdc31513a106533/1606222306110/color_mixing_lesson_kindergarten.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fb6b88c99b6d37a78a63/t/5fc237c63f75b166431dc3c2/1606563782568/nupaxidijobitavu.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/messenger_lite_app_for_iphone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38cee68612547ed6ea9f6/t/5fc6010fe18c5c478ec97fa7/1606811921456/ranewu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1318a5bcb0228a2845bc9/t/5fc30a6a5147b14804975d53/1606617708097/ancient_greece_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a59a3dfdd95b60fd26c5/t/5fc83bbc90a4f8549d70d02f/1606958012935/jesisunojidetuvosabem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1630612facd59ceb05ffc/t/5fc78c0b3d56556d1440ff90/1606913036687/damaruvisesewel.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_off00011003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11003 5724 bytes
SHA-256: c7a61fdc525ca555b587583f003b2406221d0c4c089e4f63366caf1edf6dfb74
font_01_sfnt_off0001236f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236F 11680 bytes
SHA-256: 76a82705885a2ff66d19664d7db8c3e8c60604b4e11508a30d28ce05a06fcbfb

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