Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f2a5c8f991d660…

MALICIOUS

PDF

90.5 KB Created: 2020-12-27 11:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9bbcc3d76aed63b4fb97cdc13f01f9af SHA-1: 9f349727f5e4b57275f229fb2b63a03bf18c8482 SHA-256: 63f2a5c8f991d660045622f77f053a94f829a73080b24df9a53ae404f7bf3eb5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The embedded URL, 'https://traffine.ru/123?utm_term=chapter+2+chemical+basis+of+life+worksheet+answers', is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://traffine.ru/123?utm_term=chapter+2+chemical+basis+of+life+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460230/normal_5fa82758bdd46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393752/normal_5fc5c44797f93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5fcf2f3f253c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f9eaea6510a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497082/normal_5fc43578257e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/bidezebexana.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/sojizudirafotupobekesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a945e1-8048-4cf0-9484-17a66550e326/11929539533.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/bluetooth_free_for_pc_softonic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545d9a3c-5485-48b3-bba8-4ad5d7cd4cbe/92428298042.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/wemefefitexirokotisu.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/zoruzotomovi.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.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD755 3860 bytes
SHA-256: 46269eac9320d267e0ec9878ccdf138bafe1bc6e1adcd0799d4ded51fa344a65
font_01_sfnt_off0000e4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 5492 bytes
SHA-256: 59309997fc7f994d223c471d7732ca0101f834212fc430f0c43fcd2edcede8b7
font_02_sfnt_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 13920 bytes
SHA-256: 20d2edd725f2d65413133782edbe6476ae17c7501d2a8e61a1deb958dd0a3aa8
font_03_sfnt_off00011e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 15912 bytes
SHA-256: 2660ddcb90526d36886dfb4437aeaa0af8d1332fa46ad98a04cef9f7ace3ddd3
font_04_sfnt_off00014e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E20 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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