Malicious PDF — malware analysis report

Static analysis result for SHA-256 7968962243db01c7…

MALICIOUS

PDF

80.4 KB Created: 2021-05-28 18:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0c55bdcfb291a2e25ae5e6e293603590 SHA-1: 6b8a054467470e7f521a9b91d3c8ca355d7374d3 SHA-256: 7968962243db01c7213de5906c3c8f9f291da8def577a3962fec70cd9103f6e8
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://dafemum.ru/strik?utm_term=good+synonyms+in+spanish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452587/normal_6020f955c373d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_606b2d4f020e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5ff3373c61d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_600a02bb4fb6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382784/normal_603e7deda773e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_605985014c354.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/355d827e6231.pdfIn PDF document text
    • https://roxabagoxe.weebly.com/uploads/1/3/1/8/131857818/1122866.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/d3543a40-4f7d-499e-bfc4-3daca76b3273/critical_race_theory_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3122f65-2524-40e7-9e9f-4d780ea95612/lunedebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de454dba-d509-4e83-8106-2eb7fa4e7b67/61774776006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd433284-0bdc-48ad-9477-e103b77d7760/samsung_un50ku6300f_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4c29d4-ee6c-4a67-9e56-0be38029c87b/bepuzawamitotogegexejaxix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0e17949-8a80-4cd5-90e6-3b3d62087c55/16837452400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8fd34a-c7d7-4932-9b32-4227b9566b0f/mefizikiwujudufuvuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb9202d9-368b-44eb-9885-8f6300dddd8d/epson_artisan_710_driver_windows_7_64_bit_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fa8640-630a-450b-82f8-02e8a37b72b1/how_to_reset_jabra_charging_case.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8033f7d-a239-4d42-9cbd-e08ba80d4bc3/449031924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7bc38a8-f834-4870-9bb3-4e9de04bfd5c/watch_call_me_by_your_name_streaming_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e6f9f2d-2e14-4971-8a95-c92667f39b50/45805648061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67bd1da4-7366-4dd6-b7bd-10cbf04b1ca2/grisham_rogue_lawyer_series.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_off0000fc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC17 5204 bytes
SHA-256: 8d7f736138cd6420dc0b0747964225f1acb7118a1814e4bc623f0eb92d8cec23
font_01_sfnt_off00010dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAE 11332 bytes
SHA-256: 3c412360f173653dd0b59a2341d03695c19a0a05f6814aaf0d9236d5edbb144e

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