Malicious PDF — malware analysis report

Static analysis result for SHA-256 349169ea58ffc3e1…

MALICIOUS

PDF

77.7 KB Created: 2021-04-21 01:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3946f6e8f9800edb04ba7ad2f71b63d6 SHA-1: 6a454ae7cebf9ec2aae6502f3c93bcbcbf861ec6 SHA-256: 349169ea58ffc3e182b98e2da9a2c79dd2cb22dffb9d417947b82e173e130562
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body is heavily obfuscated but appears to be related to package delivery queries, a common lure for phishing attacks. The presence of numerous external links indicates an attempt to redirect the user to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/strik?utm_term=what+happens+if+amazon+package+is+returned+to+sender PDF link annotation
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/lowepumonate-mokifadagot.pdfIn PDF document text
    • https://zinurutiman.weebly.com/uploads/1/3/5/2/135295757/zegoxoregikuxeb.pdfIn PDF document text
    • http://jizemekuguzu.22web.org/guninupixomerinilogax.pdfIn PDF document text
    • http://kidepokapila.22web.org/84547643283.pdfIn PDF document text
    • http://soldatskaya6.ru/3502820693sjiwf.pdfIn PDF document text
    • http://reform-st.ru/find_the_acceleration_of_gravity_on_the_planet_venuszb4kh.pdfIn PDF document text
    • https://rutedidatares.weebly.com/uploads/1/3/4/4/134490949/21a4fd4b2.pdfIn PDF document text
    • http://nikaold.site/42240438973nv50u.pdfIn PDF document text
    • https://kevosenebiv.weebly.com/uploads/1/3/1/8/131871602/rogubusijojerale.pdfIn PDF document text
    • http://makamar.online/pefizezufidolimovilepe5wfxk.pdfIn PDF document text
    • https://duludogom.weebly.com/uploads/1/3/4/6/134673238/rinaja_rixabivoni_mizefabutumasu_teboxogiraja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fowafad.epizy.com/16043734146.pdfIn PDF document text
    • http://ragigixo.epizy.com/what_are_the_positions_in_project_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c4eb8b-5448-4d41-882d-ac671b0847ef/how_to_use_adobe_photoshop_2020_for_free.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_ecd2aaeba5c8447eb6187b7f911013a5.pdf?index=trueIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_ca5b825fc0a244d89cf628b8b7009670.pdf?index=trueIn PDF document text
    • http://dupumimegijema.epizy.com/secret_voice_recorder_apkpure.pdfIn PDF document text
    • http://jekidosokun.epizy.com/dekiwuwus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37011cb2-4168-4aad-9134-0a0fa0ad6467/rowore.pdfIn PDF document text
    • http://xezerubewuxa.epizy.com/41119179827.pdfIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_2f6cc171dd064a2896ac20007df83f00.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_off0000f157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF157 5664 bytes
SHA-256: 47dfca0c1d8cdd16c412754d20c4ed4a4dae20aaaa80a9ea69b89201b0589a16
font_01_sfnt_off00010488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10488 10776 bytes
SHA-256: a7dc4fa4578d62a7eaddc42d5f26b74f99bc9d54e3b4f6055a3fc97381814610