Malicious PDF — malware analysis report

Static analysis result for SHA-256 28787c023aeefadf…

MALICIOUS

PDF

104.4 KB Created: 2020-11-17 08:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 356a1a6d0a5b414c4000d7a332a10669 SHA-1: 58081c1d9f7bd6d42a5e7f7a8b1265d28c8e8dc2 SHA-256: 28787c023aeefadfb64e8c4fe06f195c7c807a769df56a8162de6e09c95a8d2c
154 Risk Score

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://traffking.ru/123?utm_term=a+long+walk+to+water+summary+chapter+1'. This URL is the primary indicator of malicious intent, suggesting a phishing or malware distribution lure. The ML classifier also strongly flagged the PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF is a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://traffking.ru/123?utm_term=a+long+walk+to+water+summary+chapter+1 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f9d101e52a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418963/normal_5fb29dcb11323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482853/normal_5fae4dd733782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5fa7a7b0c2deb.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://uploads.strikinglycdn.com/files/c706033d-391c-44cb-96b3-e7a584a85f21/79788207649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30a3b65-2d4b-442d-b431-af36abb340d0/38217129745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db70635d-2336-4ca8-ae89-8817154cbafc/andrew_loomis_creative_illustration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dbbd297-fd79-46f9-ae09-ff7da6562a22/46056650290.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/active_and_passive_voice_100_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a90f57a5-f365-4ae5-9f44-cd4dae010993/gijitedeturajixuwonatok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736f5b41-7db3-46da-9efe-07105e723175/lewebivibesopubun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d32801-6610-4e8d-88ae-5daf04971713/29399520875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b0d289-2da0-40c4-beb4-d8e3cdef93de/limisonejabina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2b19ba-3aa9-4551-ab87-8a0cac68da41/orelhas_de_burro_molde.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001290b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290B 5480 bytes
SHA-256: a97735759c9fe7a566ac74e7d3b4e2340593513e4ad3598fd688424116ee34f5
font_01_sfnt_off00013ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA0 2456 bytes
SHA-256: 30569510b73442e2d4a8e549f9f3904c8d0c6f7a88f726bdddf83737def40c7f
font_02_sfnt_off000146b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B0 11652 bytes
SHA-256: 1f94cadd2d4c4f97fcbb1bda4175cfc9f692660c0d11f9413fa97ee7c4de9453
font_03_sfnt_off00016e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E9D 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_04_sfnt_off000183cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183CD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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