Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b8907d548829b4…

MALICIOUS

PDF

99.8 KB Created: 2020-11-14 01:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a679df17ee669b57f38f57d04b30b211 SHA-1: d35428b011cb78ebdfccbc7290037ac0214d38d6 SHA-256: 16b8907d548829b4f3ec3b55a9cd3e899f724a34f6bcd07678fca54474d466ae
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://traffmen.ru/123?utm_term=coulmun+apply+pressure In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b08eed8-a421-404a-a7d0-3e8bd837d543/75967198250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04fb902-059f-4f86-b3bd-e32409ac89fc/super_mario_all_stars_with_super_mar.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/78935233466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e378b936-50b9-4577-aabe-94ae77ff9d7e/74098917137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d85b16d3-ec63-46fc-ba19-23a83b846576/bometiwiwuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a723dd9-f621-4776-adee-61f09ea78874/mohenjo_daro_full_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962587c2-0bab-462c-af4b-2c5a498a8c78/30922785476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec948436-00f9-4314-b8b9-ab80ff8742d2/dapafinagud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a57324d-e31e-416d-94da-85a177049cb9/basketball_drawing_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c8e2eef-774b-4792-aa05-f49c39b77cde/bonufodipoze.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C7 4972 bytes
SHA-256: b89bccfe15dd86fdcac1bd2847581cc40e616615c14684a2b3bd9d38484b6191
font_01_sfnt_off00014497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14497 12204 bytes
SHA-256: 3ffea00a5ebf5a81925b469a9df8c020b5d01b819e86ad5d3af084cf01b6426e
font_02_sfnt_off00016dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DBB 16068 bytes
SHA-256: b09879be15c6eb2246ae7b48c1c275502bdacda3194b2e7a150da035b49823e9

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