Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce64aa636c52b4ec…

MALICIOUS

PDF

66.7 KB Created: 2021-03-24 11:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 01ab8bc15eb3da7c7e067fc68dba30f1 SHA-1: 751ff817defadf0346adf5034dedb6d2ffd158ab SHA-256: ce64aa636c52b4ecdec99e8c287f380577b441f015c4f29333b07f13b9d09130
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/award?keyword=kalender+desember+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367925/normal_602b0047c46bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_602b0a6a0a130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_600e4a5ef035a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454999/normal_5fe4464bdc770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495254/normal_6037f523ac106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527747/normal_60436214c8650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411501/normal_5fd8ba10281f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412396/normal_5fe3f4ceac5a1.pdfIn 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/2c5b5494-05c0-4cef-9241-12014f9861df/how_much_are_speed_queen_top_load_washers.pdfIn PDF document text
    • https://71bfc0c6-4bef-405a-aee6-9e9dcaab3d12.filesusr.com/ugd/708cfd_88f716494939469ba0d4d898cc9d6de6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70996d8d-18e8-46e0-8781-61cbd16c8b84/why_is_black_not_printing_on_my_hp_printer.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_290bf1d4e5364d548a76759ffea10098.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5b2c91-4408-431d-9411-9df8cce18282/dixit_memories_cards.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_c00c76c29f5b40119dd285460a0459bd.pdf?index=trueIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_e1035ae315e04265a1213bf99bf73bde.pdf?index=trueIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_39441e9edf4144cb9c10ba3c426f6bad.pdf?index=trueIn PDF document text
    • https://14e2190e-1c7c-401b-bdd1-4e50d95f8180.filesusr.com/ugd/62a579_e8aa9c92d27d4eecb2012d4a04f65e42.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_c89ec5fdcdcd4eb386523679730f0a17.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_8b7e3dbff9e9474b8486c9086eefb536.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A1 5568 bytes
SHA-256: df99986044fd4914fa802a075a4078c23351a1ac1d31a8376f2191aff325fd13
font_01_sfnt_off0000db74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB74 10132 bytes
SHA-256: f03fc85c5e53f7a43531f4b22ef1372339b541d8a605ecb867245c0c91931713

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