Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c1bd2a70a69d58…

MALICIOUS

PDF

66.9 KB Created: 2020-12-16 23:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 76bc0bc28c98f1ac2a4f7d2101f4a8fa SHA-1: d33bd08feeacd816a0b70ea47c97e6ba82b92463 SHA-256: b9c1bd2a70a69d58d4a86c811ac418ba8878711193e9151b87813f2d32dd2e19
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://traffnew.ru/123?utm_term=oraciones+en+latin+y+espa%25C3%25B1ol', which is likely a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to 'Oraciones en latin y español'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=oraciones+en+latin+y+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384045/normal_5f98a2cb205b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413462/normal_5fa7f75488560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5fc082415b854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_5f9c656cc980d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_5fa3e9921b0c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5fd1ff6527356.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/buwosevax/fejakasiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/letopinet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce9f7ef127c57ce14fe504/t/5fd65cc69264095525d2ec81/1607883974840/annabelle_creation_movie_hd_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/59707178097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d8e34b-11f6-4d1c-878a-9e4fa4110faf/81020046514.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0c67848ba205d186e02/t/5fc626712dd96f5918bee232/1606821492607/final_fantasy_iii_snes_rom_hack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd18111f6a419847f67ca/t/5fc233a74f98375720291a43/1606562729688/fefaranu.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/42985506908.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27eb48ef7301f8b1ae02f/t/5fccb4dee43f2b00a8a4b252/1607251168585/tiwepimedo.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_off0000c665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC665 5268 bytes
SHA-256: 4a60266477b7d22cb07efe5fb9045cf2ee5d359e55154b77e64eb1107b63a008
font_01_sfnt_off0000d81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81E 11280 bytes
SHA-256: 13027c0cf38a754d6b83b61981b696e48beced5e77e1785bd99d084a1e1472a9

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