Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe0d37117f71a5d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-31 08:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0e95a1a8224cabe6b0c16c78db9852a2 SHA-1: 9523b8925bbc106444a10764128b4d6c878df409 SHA-256: ebe0d37117f71a5d72fc4c6cbbeec45b7c7b0db417518dfa43a7d58ef9ad6754
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 0.9999

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://jumiwimov.ru/strik?utm_term=the+book+alan+watts+goodreads PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482418/normal_606160aa8a438.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/how_to_draw_anime_for_beginners_boy.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/successfactors_workforce_planning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382405/normal_5feb8c261ec5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5fdbd33ee701f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5fd661d801b1c.pdfIn PDF document text
    • http://vnds-super.space/885271893409ovff.pdfIn PDF document text
    • http://yesnutural.space/rusonobip5kllw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409248/normal_604fd6bf5c73e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501775/normal_600115c7340e4.pdfIn PDF document text
    • http://changely.club/19167223164ct5b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_603e516492a4e.pdfIn PDF document text
    • http://arendagg.xyz/wexevibaxexejikerifetinom142uw.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/xulepiwa/calendrier_aout_2019__imprimer.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/4951635969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a843c8-36e1-4707-8140-8c944515e2fd/lisanakikixuduvebev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd66127-1005-411e-af5e-c3b0183b0c0a/arduino_4_digit_7_segment_display_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d0622e-595e-47ef-850e-fe29bcd8770a/xipuwaxatisoruwojujat.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_off0000ee1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1E 5332 bytes
SHA-256: 0ce018572b86db443dbd92ac3a1cd94266a04bf53c0b45a6443f887aae231589
font_01_sfnt_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 10944 bytes
SHA-256: 2b6ef43fc2ed62f07cea110e1dac069f3f4a509404c507e636bbbaf99ef1b2f8

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