Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e47f707bd7669c…

MALICIOUS

PDF

76.5 KB Created: 2021-03-17 04:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f2b0cb101e6492d4070efff30002326f SHA-1: c4aa5816eb7413402160b9ba7a4b4c8bee219b15 SHA-256: 68e47f707bd7669c3540b55c423a88ca426ba1749189f61fcd14f02cd2b104ab
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 0.9998

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://fokemale.ru/strik?utm_term=things+fall+apart+character+list+pdf PDF link annotation
    • http://wisatemubudu.medianewsonline.com/2018979765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368229/normal_60032432d64e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_604d354a101f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_603ff0accc48c.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/fif31Pw/oregonian_oregon_ducks_football_news.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fe5ab56519cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476001/normal_60460dc7ea472.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/LjcicIO/posamovotuborokolobag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492918/normal_5ff9edd71fe5f.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/59217842461.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417805/normal_5ffcf33dbe279.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/basic_multivariable_calculus_marsden_tromba_weinstein.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/wazotojemov/diviner_guide_gloomhaven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0162c6be-8a4c-4a14-a8bb-a3efc6942962/3417307788.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/love_yourself_lyrics_meaning_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786ad64d-77c1-42b2-a56b-d33028d06ff0/asp.net_tutorial_for_beginners_visual_studio_2010_with_c.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/bujakuwibe.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/free_printable_flat_stanley_girl_template.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_off0000ecb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 5368 bytes
SHA-256: 69ba075867a29582f6703499e9b65901e5009e3326cf4210a108922e77c2360c
font_01_sfnt_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 11036 bytes
SHA-256: df23931d8d25d9dae8d5a89bc5febce5112365e4717e833327ee68bb564b94b1

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