Malicious PDF — malware analysis report

Static analysis result for SHA-256 102f187b4fd5f78c…

MALICIOUS

PDF

71.8 KB Created: 2021-04-05 14:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 98d805764152c27fac8d6b3f140b13ce SHA-1: 5653dd0b9035d7ea275b77607ca65f19c950d17e SHA-256: 102f187b4fd5f78cfc658e226f1df97584b51e7813ca2c39f65febbbaf40f5d3
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 0.9994

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://leonvi.ru/wix?keyword=monster+gorilla+games+unblocked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489713/normal_5fefbe757c6e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468554/normal_5ffbcf0ece05a.pdfIn PDF document text
    • http://autocredit.moscow/35870266583rn47o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369506/normal_5ff03c079aa9c.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/pojitefowusa.pdfIn PDF document text
    • https://revowerixes.weebly.com/uploads/1/3/1/6/131607662/936bdd3516698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_605fb93ea57ad.pdfIn PDF document text
    • http://wegansit.space/3_examples_of_centripetal_force_ap_human_geographyh4und.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/lusewuw_madonili_depemudoja.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/2538372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_5ff0dd024c22f.pdfIn PDF document text
    • https://folumenudi.weebly.com/uploads/1/3/2/6/132681426/8282049.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://s3.amazonaws.com/fixararololu/11198510185.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/autoresetevent_and_manualresetevent_in_c_example.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/50122915650.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/88153273155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f3da96-c30e-4c62-918f-9b07797c6246/what_are_2_benefits_of_glycolysis.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/tobelokata.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/ethnic_vocal_sample_pack_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659188fb-cd89-4a4f-8d65-e799eb913b76/12188175710.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/zotabomikir.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/the_innovators_solution_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD152 5348 bytes
SHA-256: dd2ed5f598ad2a6ac176a77628f460b22cf8d8aa232f9ed9dafdd70e3bb98bb3
font_01_sfnt_off0000e36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 9456 bytes
SHA-256: 92806d9c73001c9537db8269cb79083416aff19accbf3a4391139aa73f0f80cb
font_02_sfnt_off00010392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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