Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6085aa7720d8b2…

MALICIOUS

PDF

73.9 KB Created: 2021-03-23 08:10:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a5e47fbe7f9f647767146516da7cb0e1 SHA-1: bb1f1a4e8c607d49e51debf02638788dfdbf1a91 SHA-256: 2c6085aa7720d8b28a501756c7dc2eb8527e27feb0ee38b3af9e7974de6aa77a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, which is characteristic of a link farm designed to distribute malicious content or phish users. The presence of ClamAV detection and ML classification further supports its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/strik?utm_term=how+do+i+change+the+battery+in+my+cyberpower+425va PDF link annotation
    • https://cdn.sqhk.co/rirelolut/Ggdaifd/oceanhorn_2_release_date_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/yQeggPx/is_pch_lotto_app_legit.pdfIn PDF document text
    • http://rokonedewok.22web.org/volipudena.pdfIn PDF document text
    • https://cdn.sqhk.co/zapinebow/fCgI3he/shelter_in_place_georgia_june_12.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/gh6ybW3/the_hammer_man_killer_video.pdfIn PDF document text
    • https://nametipij.weebly.com/uploads/1/3/1/1/131164318/zefokas.pdfIn PDF document text
    • https://cdn.sqhk.co/letiludixo/hbsmidx/angular_formarray_change_value.pdfIn PDF document text
    • https://cdn.sqhk.co/rifibimilo/ibQUGgj/love_rosie_quotes.pdfIn PDF document text
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/d84d22729ce0.pdfIn PDF document text
    • http://purigoguwoz.22web.org/58380311424.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/fhhX5PC/swing_trading_books_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • http://fisusuwisefib.22web.org/wiwuxigonuzopes.pdfIn PDF document text
    • https://cdn.sqhk.co/digubamot/ihbXiaC/30262591167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakulugexogi.rf.gd/25242325880.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_bc9e988403b14411aaae87af43e13e93.pdf?index=trueIn PDF document text
    • https://83bd47e3-138d-48d8-8d00-514fe13b91b0.filesusr.com/ugd/c87a2f_50c6139c8e9c4f6cb39d368e59842374.pdf?index=trueIn PDF document text
    • http://besevinoferoza.epizy.com/35550229821.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_off0000ddd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD4 5976 bytes
SHA-256: eb8c27a5965d94877f15a5bfa3283ac7707e954f85a40f3248156726a35f1c09
font_01_sfnt_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 11696 bytes
SHA-256: 5cc26bac11bbd14bf6f9a4558241156d8b3eb3b5906b7bb15d83df1cd27b4f71

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