Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6a126b15fd58ea…

MALICIOUS

PDF

111.6 KB Created: 2021-03-15 21:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1be6389a709fd37542f80dcf2b61cf96 SHA-1: 9201bc1c7ebd8c5f4f0a3ecbe62a2d17d56c6374 SHA-256: 5e6a126b15fd58eada0215961a2458a3f9b1c380d5dbf2c8f66c4f6d1101263d
134 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. It uses an urgency-based lure. 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 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=personal+statement+residency+internal+medicine+img PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422627/normal_60410f231683b.pdfIn PDF document text
    • http://mazafaka69pussy.online/html_code_vlc_media_player18pzh.pdfIn PDF document text
    • http://bowoporoj.iblogger.org/gta_liberty_city_stories_pc.pdfIn PDF document text
    • http://wersita.space/gunther_muller_asaltante_solitario4ozik.pdfIn PDF document text
    • http://businessoutsourcing.org/67215366310ot2xu.pdfIn PDF document text
    • http://fito4ka.xyz/615259301994eyuq.pdfIn PDF document text
    • http://amandeepsadyora.com/1061710338271aku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_602977f9b5a74.pdfIn PDF document text
    • http://bigmagazin.xyz/average_annual_salary_of_a_compliance_specialist8p1r9.pdfIn PDF document text
    • http://dwatches.site/word_2019_selection_is_lockedp3rxj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416664/normal_600239d957223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457005/normal_6011ad6f2adf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ebf0526-ca18-4b8b-a5cb-c87bbb8eb31e/sherlock_holmes_malayalam_books_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc384e25-29f9-4e5b-9f3e-759a6af2cee6/identidades_trigonometricas_pitagoricas_por_cociente_e_inversas.pdfIn PDF document text
    • http://lagadasisipas.rf.gd/tamil_dj_remix_album_songs.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_74206ecece854afeacae677d8bdc6789.pdf?index=trueIn PDF document text
    • http://mujusitajal.rf.gd/68928284364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5483c40-1d10-42e7-a115-450a1f17b8ca/82870053122.pdfIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_50fa4bfa51384e10adb74b3e5b5913f3.pdf?index=trueIn PDF document text
    • http://fujeraxujixu.epizy.com/kabamov.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_35c949a521ca4518802563b241c37101.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001618d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1618D 5360 bytes
SHA-256: 91048cd52da83fd139ba554e6851fb8a4c234edf3f2af3dbd24d379f19050ef4
font_01_sfnt_off000173b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173B9 11092 bytes
SHA-256: ac7fca5491959432969ced7680e38368b9401959ecd78d07db42395bc85f252e
font_02_sfnt_off000199ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199CA 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848