Malicious PDF — malware analysis report

Static analysis result for SHA-256 6132bbb7d2d3199c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-15 09:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7bf70de6ce75c581d2590f61fb1263dd SHA-1: 0d8a06634f0c36e1285abc591f592b0d5ee97a26 SHA-256: 6132bbb7d2d3199c8f2b0277e454e59a0f736dfc7d62c1782717788b2b14b42d
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 0.9997

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=biblia+de+estudio+teolog%25C3%25ADa+inclusiva+pdf PDF link annotation
    • http://sokelekife.iblogger.org/anjali_kannada_serial_song.pdfIn PDF document text
    • http://dokeximikeveved.iblogger.org/why_my_mi_remote_is_not_working.pdfIn PDF document text
    • http://gufubugab.22web.org/journal_of_business_research_guidelines_for_authors.pdfIn PDF document text
    • https://cdn.sqhk.co/takoxuwal/cFYiiI0/73290519300.pdfIn PDF document text
    • https://cdn.sqhk.co/giwegulatil/emjzid2/30588408405.pdfIn PDF document text
    • http://idealica-ituficiale.website/15904692991vexea.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/95488022919.pdfIn PDF document text
    • https://cdn.sqhk.co/jomawutid/jbqmdhh/68203513390.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/dpge0zc/free_wallpaper_apps_for_android_phones.pdfIn PDF document text
    • http://inertbhjbj.ru/connect_math_answer_key_college_algebralm1dg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/purawuma/disaster_management_powerpoint_template_free.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/35903432757.pdfIn PDF document text
    • http://lanakupi.epizy.com/2294822834.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/aided_school_appointment_order_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/mockingbird_eminem_piano_sheet_music.pdfIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_992384370373418c82b9b5f273dbe5fd.pdf?index=trueIn PDF document text
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_7d862690d027482a88423d104a79618a.pdf?index=trueIn PDF document text
    • http://wipapirub.epizy.com/13196986056.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/atomic_structure_class_11.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_0b892848a8334629acbac757a82cd6cb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 5528 bytes
SHA-256: 986f30a284404124397189d34127151a3fe607f7e4f5ae8e8a3860b7bf57de86
font_01_sfnt_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 13732 bytes
SHA-256: ff5e4710bbc38f9b2a950d65df24c305392d6b7370cf54067e7e2690553ea1d7

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