Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb26458d292b801…

MALICIOUS

PDF

91.0 KB Created: 2021-03-16 09:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4912e4d2cb3cd46d8fa489a62a46969b SHA-1: 576174ba18d258dc6450e1e252f991c119daaec3 SHA-256: 7bb26458d292b801719bfa1b3d1cc777d3e142359187a71e1ae4787f18828229
186 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. 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 0.9980

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://druttle.ru/strik?utm_term=what+does+te+amo+mean+in+korean PDF link annotation
    • https://cdn.sqhk.co/woxemumi/agihhPi/ikea_restaurant_hours_portland.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/FhfugjM/no_man_s_sky_multiplayer_not_connecting.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/jdidgjF/74722859289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447280/normal_602823097f908.pdfIn PDF document text
    • https://cdn.sqhk.co/bomaguvodar/hgLnihH/mozarujobemubupegapuz.pdfIn PDF document text
    • https://cdn.sqhk.co/dufadafakuti/bUthaha/23816402943.pdfIn PDF document text
    • https://cdn.sqhk.co/vekudaselux/ihgdDpk/baby_fun_park_baby_games_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/rebawigabog/Uje4qu6/prospect_umc_covington_ga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375694/normal_5fcaedcc4e150.pdfIn PDF document text
    • http://dikuziropuviv.22web.org/climate_change_2007_synthesis_report.pdfIn PDF document text
    • https://dazifefizax.weebly.com/uploads/1/3/4/8/134854215/8954385.pdfIn PDF document text
    • https://gexuzofive.weebly.com/uploads/1/3/4/2/134234570/gozeriraroxinunapa.pdfIn PDF document text
    • https://punoburewi.weebly.com/uploads/1/3/4/3/134305970/1188598.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/8dzecgd/11274091086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500889/normal_6018d401d2c92.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/hjclicz/rotito.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/ehiIgd2/76876898226.pdfIn PDF document text
    • https://cdn.sqhk.co/bijilixiger/cFZbQn3/cute_profile_wallpapers_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/hhfxgeX/85117340953.pdfIn PDF document text
    • https://cdn.sqhk.co/vopuvafamiw/cQ9jjdH/23258944929.pdfIn PDF document text
    • https://cdn.sqhk.co/jujijodop/dtO9Cwn/17299055069.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/jjgdaii/93490290228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_5fdb816d31d39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gibonoxemibete.rf.gd/tatijitivegu.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF2 6804 bytes
SHA-256: 28b39597e1b5a207952c2ded4d6a2b70a449ccc08cce7f12a798387c99f032c3
font_01_sfnt_off00010d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2B 5108 bytes
SHA-256: e0fca82a2c44914594b37461face30be96783af74b9e4f99bb5d8055d9f40984
font_02_sfnt_off00011e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E69 11708 bytes
SHA-256: c5d9fd1cecf41999465a3a2fe66558a24b4e18baf43ab1c6e340a0bddc45d8cd
font_03_sfnt_off00014633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14633 16668 bytes
SHA-256: 6d264f9ddb8924d14d3a4979b4eb1d141f4633fef629607d9369c9af1b896daa