Malicious PDF — malware analysis report

Static analysis result for SHA-256 5069f940ea72c9cf…

MALICIOUS

PDF

74.0 KB Created: 2021-03-26 06:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8c6e01bf51b76784461c13a21478f80b SHA-1: 231733b36e51bbc6fe1a05889d752600b4cd019a SHA-256: 5069f940ea72c9cf4a77d164aa56af226e7b3f7ed96cf8076ace0635e0188c14
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm on disposable hosting. The document body, though truncated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content. The embedded URLs point to suspicious domains, indicating a likely attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=garmin+nuvi+2797lmt+parts PDF link annotation
    • https://cdn.sqhk.co/kukelagalefe/iichzzn/ark_survival_evolved_ps4.pdfIn PDF document text
    • http://womans30planet.com/citizen_gn-4w-s_eco_drive_pricexe27f.pdfIn PDF document text
    • http://goxamid.mypressonline.com/2010_amc_8_problems.pdfIn PDF document text
    • http://zupojekexijofog.22web.org/masolelofab.pdfIn PDF document text
    • http://re-capital.ru/conductors_and_insulators_answer_keyg6prj.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/hnieifZ/37684796737.pdfIn PDF document text
    • http://obschee.xyz/partial_product_multiplication_worksheetumdq9.pdfIn PDF document text
    • http://metryck.info/who_you_say_i_am_piano_sheet_music_easy80foq.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/EijrUYR/53346089380.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/Hjgicha/jeganonatigozafuwabug.pdfIn PDF document text
    • http://foguwefo.iblogger.org/52265954396.pdfIn PDF document text
    • http://punegasu.22web.org/32920141277.pdfIn PDF document text
    • http://letuxegesilem.iblogger.org/free_balanced_scorecard_ppt_template.pdfIn PDF document text
    • http://tovelksa.website/129253680266o0pi.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/gjmjdgf/wixonujotesiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwedilejom.myartsonline.com/why_is_there_no_sound_in_adobe_premiere.pdfIn PDF document text
    • http://xevemifura.rf.gd/black_amoled_edge_wallpapers.pdfIn PDF document text
    • http://jubovedukazef.rf.gd/59078256041.pdfIn PDF document text
    • http://vuxupib.epizy.com/how_do_you_adjust_a_riving_knife.pdfIn PDF document text
    • http://kutukisorato.rf.gd/us_navy_seals_requirements.pdfIn PDF document text
    • http://newepizudef.atwebpages.com/physics_problem_solving_books.pdfIn PDF document text
    • http://roxujewov.myartsonline.com/bhagavad_gita_slokas_with_meaning_in_telugu.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_off0000e457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 5424 bytes
SHA-256: 764f41f565fb947de43df58c7ff37b8c6e46c7270d466b9e7f22696bae672a53
font_01_sfnt_off0000f6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 10708 bytes
SHA-256: f54ee2f59e3fcb9ffa2fda9d4d5f3e667429e283e9b4bdd558d9126c9bb2d676

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