Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb0541f3bc7f3bc…

MALICIOUS

PDF

76.4 KB Created: 2021-03-21 08:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4b0f102d499c10d82be53e640304bb7f SHA-1: b24af6a66c77363509446f8b6dcf7633d3c2f6d8 SHA-256: 1eb0541f3bc7f3bce4eb0b736fb15825146199ef9eb581c53f497c96b7745739
186 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 0.9995

Heuristics 6

  • 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.
  • 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://jottigo.ru/wix?keyword=dcm+water+density PDF link annotation
    • https://cdn.sqhk.co/vadavenaw/hifUjfy/71452730766.pdfIn PDF document text
    • http://natlegend.space/craftsman_ys_4500_replacement_engine9dm6w.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/ha9ibjd/lumonepamonedufaxufume.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/jc8Pazn/gegenefemenofugidelegelu.pdfIn PDF document text
    • http://kinigusuk.iblogger.org/ccna_voice_virtual_lab.pdfIn PDF document text
    • https://bavopasivivewid.weebly.com/uploads/1/3/0/7/130738836/4e28ceb.pdfIn PDF document text
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/jadajaruwezibederon.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/iieSGS9/spirit_sprint_mod_apk.pdfIn PDF document text
    • http://bullbananavannaone.xyz/please_disable_adblock_android2189f.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/h1hgIic/find_my_phone_app_on_apple_watch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_6035bfb64a26f.pdfIn PDF document text
    • http://tokepefanoxite.22web.org/64265560232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416504/normal_5fdc4a7019693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fedf4f7a0534.pdfIn PDF document text
    • https://bazewubudib.weebly.com/uploads/1/3/4/7/134731154/ffe79d4d.pdfIn PDF document text
    • http://creditactive.info/vogosasofituq0mxk.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/peveziwoguxuzam/texamadikodalanojop.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/general_psychological_theory_papers_on_metapsychology.pdfIn PDF document text
    • http://fepaxediv.rf.gd/balance_sheet_format_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/46490395433.pdfIn PDF document text
    • http://lotarikavim.rf.gd/how_much_do_data_entry_jobs_pay.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/how_to_greet_in_text.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_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 5248 bytes
SHA-256: f9cd4fd366a0c393617b5e063e7d506f8b0b51a385f7a8ab235dba76ab7f7445
font_01_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 10760 bytes
SHA-256: 1b003983214d7a6400c90653a9ee4dbd99741fa165fe6374967e55f9139acb9e