Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10789aa04c669b5…

MALICIOUS

PDF

79.8 KB Created: 2021-03-13 20:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 666d93d98260807d1f638cf3da838bb7 SHA-1: 94c88e9eb914edccb34c93805a7674f641379f71 SHA-256: a10789aa04c669b54ec731616b5a7c92b2ea0377b848768087bce483c518c0d5
126 Risk Score

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 0.9961

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=how+to+use+ps+gold+headset+on+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408324/normal_5fdb7981c9724.pdfIn PDF document text
    • http://neuroncraft.online/96919209513v372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403823/normal_5fef450f6ff85.pdfIn PDF document text
    • http://naturka.space/compound_sentences_exercises_with_answersm4rml.pdfIn PDF document text
    • https://folimero.weebly.com/uploads/1/3/2/6/132695744/d6d0102092dea.pdfIn PDF document text
    • http://idealicaufficiale.website/company_of_heroes_2_us_guidek93x5.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/nadefisasixodof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_6010836fceedf.pdfIn PDF document text
    • http://bilet-pdd.site/sidopunawefizijew5180s.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/dosibawuserotozovudajadovv3j8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_6004956e73e31.pdfIn PDF document text
    • http://ig-about.net/blues_guitar_licks_tutorialmyjy7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458848/normal_5ffa21df46214.pdfIn PDF document text
    • https://nokuzase.weebly.com/uploads/1/3/4/7/134765685/1b3accbf.pdfIn PDF document text
    • http://kukushka.space/antiform_and_anticlineab4k4.pdfIn PDF document text
    • http://mihetos.xyz/453346404316kljn.pdfIn PDF document text
    • http://tranquils.space/richard_iii_1995_full_movie_onlinesf0ug.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/2b2e27be8333a.pdfIn PDF document text
    • http://winoorama.site/bleach_ost_336307.pdfIn PDF document text
    • https://paluwewokob.weebly.com/uploads/1/3/2/7/132712057/nalibiropop.pdfIn PDF document text
    • http://tophomework.space/4388833467b6a8b.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/gazivemon/10779160189.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/facebook_business_contact_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/u._s._news_world_report_mba_rankings.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/backup_all_photos_to_google_drive_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/wezuxezojuref.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_off0000f7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A4 5292 bytes
SHA-256: fac00242cad353478dd990359b1b0c9971297de854974a96fda1ce5d18287242
font_01_sfnt_off000109b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B4 11116 bytes
SHA-256: aa46193c3b8d855758d9cb7ade61d9d3e5cfc700de5273543d4b6098deb6199e