Malicious PDF — malware analysis report

Static analysis result for SHA-256 30632bbbed397b53…

MALICIOUS

PDF

84.4 KB Created: 2021-03-18 16:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 544a467dc49cb2f5e1775e4a525568f7 SHA-1: af133f28c9f6966e74aaa367b6cbb3588086b3b2 SHA-256: 30632bbbed397b53561b68c0c42e3bdd93c1aeba0429154ef1e5a434c671ae3a
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 0.9991

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://crophysi.ru/award?keyword=apoptosis+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386607/normal_600452b5690a4.pdfIn PDF document text
    • http://ihsteam.ru/537215682524d0zf.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigizakeku/Kjgtjh7/63511548602.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/qKL47ja/ind_pay_app_download_for_pc.pdfIn PDF document text
    • http://tradestaroffice.com/11118314406k8i2p.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/f2jdCE3/spin_the_bottle_app_the_leftovers.pdfIn PDF document text
    • http://zinefikitozozeg.sportsontheweb.net/wikipadujivuzojigix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482191/normal_602063b58d9f9.pdfIn PDF document text
    • http://groby-ritual.online/gutekabulesivufumoma3ss9n.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/what_is_biological_psychology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_600a10a4c938c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_60461ce1a2fd4.pdfIn PDF document text
    • http://twitter-center.com/navy_blue_quilted_jacket_womensdngj4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5fcc1a50e87f0.pdfIn PDF document text
    • http://micrometerdigital.xyz/vaveturedi7btd7.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/4b34b715-255e-4796-b5c8-ee31bd9a1607/7283355323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250243c0-7f2b-46ec-8d43-1998f1d839f8/vadotidutomadobaret.pdfIn PDF document text
    • http://xifeloj.onlinewebshop.net/the_night_before_christmas_movie_actors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/312724c8-1f6d-4918-a332-3a5466e93769/bimokitutupapejilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f17b128-6464-4ffe-bc70-6ac0433324c0/99161582726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc27dba-46a7-48d0-a3e3-4c229213bb30/20526623848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7adc8f70-6827-4e9b-b1ee-c048fa169bb6/fakijimojokakunesupokut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ab41a0-3fdf-4468-bb3e-87b6fd535c40/ideas_for_multiple_streams_of_income.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f306b0e-87a0-4513-b7e8-db530782a3b5/duzizonanolijikagoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7811fc-3102-4ae9-bcd4-f9e943ae9c4e/how_much_does_starbucks_pay_in_california_2018.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_off00010df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF3 4892 bytes
SHA-256: 27f42a7bd273dd599d116d214e73cf844836e4ed15def8c597613c0f74bc4b31
font_01_sfnt_off00011eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAA 10960 bytes
SHA-256: 2da62f1bb92c651f157180c9554f86b243f06b4a895b7a09010fdaa4d4c6d10d