Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d205a09fc64570…

MALICIOUS

PDF

74.1 KB Created: 2021-03-06 16:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 506584da9dcd61110c226e3ec28f2b9f SHA-1: 9ff3c63175aefe8a503e2dd04189ea08c454f187 SHA-256: 14d205a09fc6457088e5851213ccd78babd9c5b3d419a6ef7e7b1842c11a83c1
126 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 0.9998

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://seumenha.ru/strik?utm_term=model+averaging+logistic+regression PDF link annotation
    • http://faxusupovetek.sportsontheweb.net/dopelumobawa.pdfIn PDF document text
    • http://paxabak.mypressonline.com/arms_reach_mini_co_sleeper_bed.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/calendario_escolar_2019_y_2020_sep_cdmx_para_imprimir.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/how_to_write_essay_about_myself_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopexetosezulav.rf.gd/13605277194.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/features_of_forward_contract.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/38476091687.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/why_is_my_elitebook_not_charging.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/cardiopatia_isquemica_electrocardiograma.pdfIn PDF document text
    • http://mepatizus.epizy.com/27966366554.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/how_to_upgrade_icloud_drive.pdfIn PDF document text
    • http://xotopunutogor.rf.gd/35999200922.pdfIn PDF document text
    • http://parubixus.rf.gd/how_long_do_electric_snow_blowers_last.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/valkyrie_profile_lenneth_apk.pdfIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/most_effective_call_to_action_buttons.pdfIn PDF document text
    • http://mekamaxabojumoz.epizy.com/97554343563.pdfIn PDF document text
    • http://wawutanow.epizy.com/airbrush_easy_photo_editor_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/install_android_sdk_ubuntu_18._04.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/gmail_blocked_attachment.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_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 5172 bytes
SHA-256: 2a4b2f5bf1227f216fc5055e88f8f4e449b6c44a5f48d578dcc19ed9c259003d
font_01_sfnt_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 11184 bytes
SHA-256: 4f014d13717c5ad759bcff1f135c8bade8c35ed1d53766890130f9e2a9d26568