Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5cba8cdb52b5bc…

MALICIOUS

PDF

84.8 KB Created: 2021-03-14 12:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e3f9e3ccddacf618aba3e7f88b0063e0 SHA-1: 5e228015794954cd6418a1351cb1dc67ba4cdf92 SHA-256: 0d5cba8cdb52b5bc369300d213cdf9ac59226887869b6ac819dd8ccd22cabae4
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 0.9990

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=which+penny+stocks+to+buy+now PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5fda7230d858e.pdfIn PDF document text
    • http://redirunna.xyz/bepiputarn73u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454306/normal_6008606ae2997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494674/normal_604621f435629.pdfIn PDF document text
    • http://sayfelengs.space/57159746716333zi.pdfIn PDF document text
    • http://beliyden.xyz/fadipexoratusf31u1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444366/normal_5ff86d246f432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378857/normal_5fdfab8d49a5c.pdfIn PDF document text
    • http://leqqurint.online/11._sC4B1nC4B1f_kimya_modern_atom_teorisi_notlarC4B1zuxx8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_6023df8bd0418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_5fd9ce7bbc199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470533/normal_5fe8be56041c7.pdfIn PDF document text
    • http://dkblogin-de.com/45275352720o8vw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/819c0e66-5554-427e-946b-7de7af8649be/stop_walking_on_eggshells_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd72f35-5e87-4110-8d0d-c95b4c98f5d6/how_does_a_furnace_sequencer_work.pdfIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_b453f97a23604a6e91402e8747a7b2ee.pdf?index=trueIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_1c43ea030734461997f18d770764f83d.pdf?index=trueIn PDF document text
    • http://xubinexe.rf.gd/48243965266.pdfIn PDF document text
    • http://divupovive.epizy.com/38676872715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea3f380-05eb-41e4-bfda-7a060a1909cf/piwuxokabepedelofut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6c440b6-0b45-47fc-9f7f-2812ebd3e832/how_to_clean_a_single_cup_keurig_machine.pdfIn PDF document text
    • http://zagiwis.rf.gd/soul_calibur_6_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc33d732-a091-4944-8fc3-3ffee16b1bca/apollo_250_dirt_bike_near_me.pdfIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_266a9567990249b98abaf96f8d57d045.pdf?index=trueIn 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_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 4976 bytes
SHA-256: 72c1afa754f50185faf5afc24646e599c6375a02a2523cfbb1a7eb7040c9b441
font_01_sfnt_off00011014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11014 11672 bytes
SHA-256: f00885375359ae5e1bb911c11b491e42741dedf8aab988900c6a28766ba1e758
font_02_sfnt_off000137d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e