Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f6f07898e0f3c5…

MALICIOUS

PDF

76.2 KB Created: 2021-02-17 16:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5a8367af9d8d563a79b1d9122470eacb SHA-1: db45912babc9ab2f14601c62ae0822025dc516ed SHA-256: 06f6f07898e0f3c50872a53ab4008eba521acfce8952c9a6e692acb475e9e8d8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or redirection scheme to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to a search query, aiming to trick users into clicking on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/aws?utm_term=where+did+they+film+the+princess+diaries PDF link annotation
    • http://sufupisiwe.22web.org/diagnstico_de_anemia_falciforme.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/267641617649qk95.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/3lJv6ie/11187273277.pdfIn PDF document text
    • http://zemimumaloger.iblogger.org/weather_report_for_la_veta_colorado.pdfIn PDF document text
    • http://invitesistem.ru/free_wifi_phone_on_android7i0i8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404738/normal_5fde308aaab95.pdfIn PDF document text
    • http://zakofuta.66ghz.com/wowuxo.pdfIn PDF document text
    • http://batmbatm.ru/gapivasokal3djbx.pdfIn PDF document text
    • http://lerob.info/87170343242k6d59.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/second_cuneiform_stress_fracture.pdfIn PDF document text
    • https://cdn.sqhk.co/bavozazav/lgd8iiY/learn_how_to_sing_better_vocal_training.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/tgcCidn/my_account_btc_bahamas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5fd22fbbebc02.pdfIn PDF document text
    • http://gachihyper.xyz/what_instrument_is_best_for_beginners09ulx.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/ZjjijkU/enerpac_hydraulic_cylinder_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371809/normal_5fddfa993f80e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_600a87632e03c.pdfIn PDF document text
    • http://xubasis.22web.org/microsoft_office_excel_dashboard_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gekuvilis.epizy.com/15901126691.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/levagodezojulex.pdfIn PDF document text
    • http://nirobow.epizy.com/duvodurafudo.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/41605477059.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_off0000eb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0F 5508 bytes
SHA-256: a2dc4b123962311d803c9873f0712bc62e9ee3cb816927e9460ae1e76851befd
font_01_sfnt_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 10892 bytes
SHA-256: f392d70ca3697e0a2f1ebe4955524979076ec2c1d0a5da6e264dd90de2876a61

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