Malicious PDF — malware analysis report

Static analysis result for SHA-256 533c03d983d21737…

MALICIOUS

PDF

84.9 KB Created: 2020-12-18 11:18:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6625eeaf510828266accf60b7deb578a SHA-1: 1238a84f847216334c0a72b946908d2035df9418 SHA-256: 533c03d983d2173765950c01fa89f14f85c8122f9ff8f60b355b7627768c7418
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://trafffe.ru/strik?utm_term=watch+the+spectacular+now+free+online+123movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413735/normal_5f958a402d0eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5f8dd3012c178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_5fb8b0dd81aab.pdfIn PDF document text
    • https://laverikiwife.weebly.com/uploads/1/3/4/5/134502667/gaxutopakebupago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_5fadbfa48c0aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f8aba3e135ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_5f9d73daaaa66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/baabul_movie_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc677b11-4a07-4f73-8df8-9f6dc9e885ec/zibixuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc5a7c46-e655-43f5-b797-6122c534c4dd/kendall_rento_mi_piel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e403ec5b-a617-4586-a3af-46ff859c0cf1/adobe_flash_cs5.5_serial_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cc1763-a09b-4e3c-947f-3f34376f7ccd/dp_dual_trac_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c73459-0387-4c6c-a8b7-d47bc40691e0/tagapixixenimixoso.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 5648 bytes
SHA-256: ef197fe1370bd24f322db4a3a18fc4bd83a6b561288e820629763a2331daec7a
font_01_sfnt_off0000fcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAA 11232 bytes
SHA-256: 835e46d10e8f89220c9c2a706b1970c12106e165a91d93d98904fd0f835ee310
font_02_sfnt_off000122c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C4 16152 bytes
SHA-256: d35fd1272a79afd3fa4e0bdf1addbddf808ce07e65599d40cfe363038f0ed57a
font_03_sfnt_off000137d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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