Malicious PDF — malware analysis report

Static analysis result for SHA-256 03796b5f34858905…

MALICIOUS

PDF

79.2 KB Created: 2021-03-25 17:06:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 713a85054aa6e821e67052af666697e3 SHA-1: 5d04cfcd4c1f0dd92a73f194542cfe49f410a551 SHA-256: 03796b5f34858905a981e100a5c2d0fe7fffd26fc081e8400b1810c3de1aa946
156 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 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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=clash+royale+mod+apk+clashmod.net PDF link annotation
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/wigalokefimotedofusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5fd6e2bc80e94.pdfIn PDF document text
    • https://gezeteweni.weebly.com/uploads/1/3/4/0/134040803/9466887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501029/normal_5ff600c8e51ed.pdfIn PDF document text
    • https://jotukodapoze.weebly.com/uploads/1/3/4/6/134632246/2856487.pdfIn PDF document text
    • https://sigukelerodon.weebly.com/uploads/1/3/4/4/134491686/zumigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/gamevapisiguwadujeba.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/borderlands_the_handsome_collection_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/jisitadolozoxafitu.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/wimizen.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/3846226069.pdfIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_65a48ff5f8ca44aeb379ef4dcdbb6e2e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/paxenowerisamolepojo.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/23828672645.pdfIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_857b90b3b38b4298859e1a0a4c15499d.pdf?index=trueIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_730764d27cd1490a9e803eb590ea7347.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/xuriwetap.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_8ed1a983dc324b7cbfd2d0b4c0272e0f.pdf?index=trueIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_a3bc76f5a5cc4a71a7a64da47f270c55.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_23c9ed3800f34582b8d04d04644a014f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutogugej/medial_cuneiform_fracture_management.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25F 5416 bytes
SHA-256: 5373abcaedaba111675298682bee92799d5e8cd81c3df86e50a9a158317be333
font_01_sfnt_off000104a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A3 13516 bytes
SHA-256: e206972c6096e40ce15faf1b58fb1e5b99d0a204eb1020127dae79492a3902ce

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