Malicious PDF — malware analysis report

Static analysis result for SHA-256 e767df746fcc1272…

MALICIOUS

PDF

150.7 KB Created: 2020-12-31 21:46:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7a470c3875cd560a1c14788cd3bf17a2 SHA-1: 9480460a632eaf9753aeeffdf03671467236ba40 SHA-256: e767df746fcc127220c80e737d0af708e04a98463c62e01319161866498e9824
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik'. This URL is likely used to redirect users to a phishing page or download a second-stage payload. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious link within the document body suggests an attempt to trick the user into navigating to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/strik?utm_term=sleep+sounds+free+relax+music+white+noise+apk In PDF document text
    • https://muwobifuf.weebly.com/uploads/1/3/4/5/134501600/7664703.pdfIn PDF document text
    • https://xananitape.weebly.com/uploads/1/3/4/0/134095977/logeloxoxeleworikaba.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/233b442.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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/902f5b4c-793e-4083-b0c4-b79eb785a0a3/tajekupaxilesulimuzef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4a35e4-72fb-451a-9ca2-a82921580d87/makifopusadidakotogebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c69d9d-c4b1-4637-a74b-753621529268/marie_nadine_j_de.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fdee3cc-36f9-401d-a0a5-e2bb3063fbbb/gifolarobazipesojabuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e500db-e60c-416d-922e-cbb3ceae4df1/61407255658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3f7976-8187-4161-84f5-35863c548648/nest_doorbell_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f306e041-f549-4a4d-9a50-85dc50b9cf55/12v_ice_maker_for_rv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b79098c-3d67-481b-a309-99c9e512d86d/81999870356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/964ad462-70a4-47ef-8c15-d12077b06bcf/certificate_of_ordination.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7988e81-0476-4f2f-99f3-0855eaa6cb34/manual_viewsonic_pjd5155.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19439 2856 bytes
SHA-256: 2cdd336d4ad4698270d9077a3b8ade5aca6d4decd0916d5d918882b18b5a1806
font_01_sfnt_off00019e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E64 5604 bytes
SHA-256: 45e37893ba494b9753157c8941462c074415faa6d044f9f853576e9cb687a1e7
font_02_sfnt_off0001b150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B150 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_03_sfnt_off0001bcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCAC 4116 bytes
SHA-256: bce822e1b456030136abc1965750a0376023355c87391f5d27ca1cb0bf7be8c5
font_04_sfnt_off0001cd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD16 17240 bytes
SHA-256: 418f224ed404491c8d1bc309f4f02f08267b1851cb6c4a7d1da26f6e45cab6bb
font_05_sfnt_off00020078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20078 21200 bytes
SHA-256: 8bde74422176945f34dc08a94824511aebb7880af11a0420694eff5d74f513d9
font_06_sfnt_off00022545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22545 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_07_sfnt_off00023346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23346 6240 bytes
SHA-256: da5a51d84da16cf1b25414fa0618f73e7140c739d051fd9b262741b46717176d

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