Malicious PDF — malware analysis report

Static analysis result for SHA-256 086ce27e53c10c12…

MALICIOUS

PDF

73.7 KB Created: 2021-03-08 17:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9cfd86f223806f4d535fbf8de7ba3e7d SHA-1: 7b3997d32590195d566a086fe4b30a99f1f1f6ed SHA-256: 086ce27e53c10c1268e33c548ec3b27dab09fe5e7ca9cba6d0e2896f25f2a608
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 0.9999

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/123?utm_term=moneysupermarket+ppi+claim+letter+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381988/normal_603bebbf4d119.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/sold_by_patricia_mccormick_summary.pdfIn PDF document text
    • https://vanixegufewip.weebly.com/uploads/1/3/4/5/134511125/5682e5b43b95e.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/vijetivuligiwo.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/what_order_do_i_read_the_star_wars_books_in.pdfIn PDF document text
    • https://daluruxixofofi.weebly.com/uploads/1/3/1/3/131398394/pedufe.pdfIn PDF document text
    • http://jijufopofe.iblogger.org/sewaruzajubipipawodo.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/6a3834da8bae3f8.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/what_is_human_development_in_biology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_60258c38ab073.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/the_fall_2006_movie_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumosaneja.onlinewebshop.net/55687723394.pdfIn PDF document text
    • http://midugome.rf.gd/xetosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225b1b2b-d9f9-43cc-ad93-25e24f621b83/83945395327.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/what_are_the_3_major_lines_of_latitude.pdfIn PDF document text
    • http://pubefanaw.epizy.com/bopumipalufafisixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c1fa0f-07f7-416d-ac4d-a3d9649fb232/dell_precision_t1700_small_form_factor_motherboard.pdfIn PDF document text
    • http://posijibanif.epizy.com/family_tree_template_visio.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_off0000e375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 5248 bytes
SHA-256: 812219b0f097dfe10617032443a617424fbe34d79d6536b0dd8785b5e13973f9
font_01_sfnt_off0000f54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54D 10540 bytes
SHA-256: 95523e9e64e888f59734223cbee34363ea646b769dbb5ce7f5f8445d16ba329c