Malicious PDF — malware analysis report

Static analysis result for SHA-256 71aa40e9977df5ce…

MALICIOUS

PDF

109.0 KB Created: 2021-04-01 01:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: efd573c1ba4ef7eca8902cf0a9385af6 SHA-1: 931060366cb1b873f8c85c65143ce76a8ff26389 SHA-256: 71aa40e9977df5ce752edb6dc0f94211d9b6eb64ecae0ff26d6169f223c4ab1f
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 0.9998

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://botokaw.ru/wix?keyword=wisps+team+sonic+racing PDF link annotation
    • https://gotunodik.weebly.com/uploads/1/3/4/6/134608857/2779999.pdfIn PDF document text
    • https://cdn.sqhk.co/vopokemib/nooDhdr/steel_weight_calculator_by_volume.pdfIn PDF document text
    • http://creditpm.com/starmaker-_sing_karaoke_songs_for_pc1ol1f.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/ggib2ae/ecology_definition_biology.pdfIn PDF document text
    • http://copytoshka.ru/794379737821tore.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://dle-tpl.site/sosarilonamaxesowun3dhhj.pdfIn PDF document text
    • http://dufigep.scienceontheweb.net/58781690784.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/sumakalajonubiiqqtr.pdfIn PDF document text
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/8948656.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/Kq82geQ/snowfall_season_5_release_date.pdfIn PDF document text
    • http://kernig.store/mojatozalebiwiza97fed.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/kizugokofo/arm_cortex_a8_datasheet.pdfIn PDF document text
    • http://taguloxutenafol.myartsonline.com/juwitelor.pdfIn PDF document text
    • http://revudipepofaten.myartsonline.com/what_would_cause_a_gas_furnace_not_to_ignite.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/76988228212.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001344a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344A 17992 bytes
SHA-256: 9216c02eb375df77039c3be41811c972324672dd98a8cb728dad041f1855dc69
font_01_sfnt_off00016dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DBC 5232 bytes
SHA-256: 8dd8d73ff3b1e4a79283caca09668f940cfcc8af77b242d664211b9d0f7a44d4
font_02_sfnt_off00017f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F80 11868 bytes
SHA-256: 899f310eff56dbfb5e9f0509ca3f0a6c6b6b759efadc6ef25f60548ceb9d41bf

Open this report in the interactive analyzer, or submit your own file for analysis.