Malicious PDF — malware analysis report

Static analysis result for SHA-256 49eae4e075bd83c7…

MALICIOUS

PDF

73.0 KB Created: 2021-03-09 14:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 003681e50eeae497437951abf68dfbaf SHA-1: b0906e578290c6cf1b4e5d8d8f638099221004f5 SHA-256: 49eae4e075bd83c769c753a1f532b10d2675f1026c2dfc9feb7f873c388ed55c
156 Risk Score

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 0.9993

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://golowaki.ru/123?utm_term=ali+a+intro+piano+sheet+music+letters PDF link annotation
    • http://wuroguredogir.getenjoyment.net/wind_in_the_willows_song_lyrics_friends_together.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/market_research_business_plan_example.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/hjpK9Xh/sidex.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/6Egehj4/text_messages_not_downloading_pictures.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/4125323.pdfIn PDF document text
    • https://nelixifejesuvol.weebly.com/uploads/1/3/1/4/131406681/susus.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/34296302374.pdfIn PDF document text
    • https://vipogonegope.weebly.com/uploads/1/3/0/9/130969266/38295b6cf9379.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/Q9lhbhb/brimonidine_timolol_price.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/11680273570.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/jc3idhd/76928854164.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuputes.atwebpages.com/12852722152.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/fubezija.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/xunipax.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/5898049304.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_c24b5c9ec6be441c961146da2719ee07.pdf?index=trueIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_d1561c49cab34d6aa4d35bdb1b93308a.pdf?index=trueIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_57ec8b804acd4bafa6bd08f6a96a6b37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levumoduf/83398279548.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/security_analysis_and_portfolio_management_in_hindi.pdfIn PDF document text
    • http://gukutimaguvuzum.onlinewebshop.net/kitchenaid_superba_microwave_light_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/9523587119.pdfIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_3acbb67162a149ec8c716783ab2132b6.pdf?index=trueIn 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_off0000e198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE198 5164 bytes
SHA-256: 96e39de610525fba73716170ec0d0e2843829e59eb50b295552782055096585b
font_01_sfnt_off0000f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 10424 bytes
SHA-256: 446b2f13a20571751a72b698874eaaf3e391295050936280fc051345965217a1

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