Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50b395655dff7fa…

MALICIOUS

PDF

83.7 KB Created: 2021-05-26 05:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fea48e99d38512bc64d158547f2c9f4c SHA-1: 50c7c374b5d1783280155e4edc41ef04ed7f6f67 SHA-256: d50b395655dff7fa965b8b82d089212999b8860bedd6fbb0687729904d1e6eb2
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://pelibifir.ru/strik?utm_term=2010+kia+sportage+specifications+australia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489981/normal_60683bda45549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_605ca1a218ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_602d02d06b252.pdfIn PDF document text
    • https://modisogisutoval.weebly.com/uploads/1/3/5/3/135390942/garibef.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/suwuxipowedeker_vukemu_fetodavuzo_lafananani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_5fd3489554e17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413374/normal_5fe4047306e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_6053c3293e690.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/56d712edf050427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_6039eb231e7d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403822/normal_5fd11be82ced7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446491/normal_6004d918e0d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490950/normal_5fe77301673d9.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/04efa7ed-6c29-4e8f-822c-fea8bb2e6f12/how_to_fix_a_disc_that_wont_read.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5f678d-fc14-4342-b39d-121bbfa4f368/domoruwodetugujele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c74aa82-2b4b-43df-b666-b3c3e3be865b/68337012927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ca6cfc-9a43-4043-b652-06b968f0add1/andrew_marrs_history_of_the_world_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7378822b-b8a1-45a8-b91b-87c596fb73d9/jack_reacher_novels_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4781a82d-383d-4d33-9854-512d0da7a7df/faxupugekizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b738d2-0927-4f20-ac03-2b515ddabee1/ego_t_vape_pen_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233a8248-c019-47bf-b266-e6383f810be8/when_you_pray_for_rain_deal_with_the_mud_too_movie.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_off00010957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10957 5476 bytes
SHA-256: 2c7e427cb100bbd035da1b5a4815c237db702851ee5eaa02c0cb394861caf44a
font_01_sfnt_off00011c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C16 10932 bytes
SHA-256: f925660610194eb6eb647c776da6645d0157ae700d9831482d983a8c3bd5dfb1

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