Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b2d92292fd713f…

MALICIOUS

PDF

142.4 KB Created: 2021-04-04 03:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 09d842088f9679eaf656d562fd153583 SHA-1: dbe5cbbd6b070ed99a8995a2fdbc9c9ce7b9e2b9 SHA-256: b2b2d92292fd713fae306d64c5a1cf98e0e03c289cdd1282f6ed868177adea18
166 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway scanning. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://zajinet.ru/award?keyword=durga+saptashati+telugu+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481156/normal_604b053031392.pdfIn PDF document text
    • http://jejederepox.medianewsonline.com/vubavisaturu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479439/normal_5fdc373e5bfaa.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/xikuzirenapesorudowopex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420451/normal_5ffd27ef6512d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_606300920a1c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_601ff2b27bef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492892/normal_6054f36b06443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376127/normal_5ffb13f8aac4f.pdfIn PDF document text
    • https://cdn.sqhk.co/lawipavoso/ibuFjhM/rojumaxokexam.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/where_are_the_tropical_rainforest_located_in_india.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370089/normal_5ff5aa3080e81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366048/normal_5fffd9ea81627.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412908/normal_6006b12cb184c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483070/normal_602be73043f47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_6061819065540.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/fhbrjbP/change_wallpaper_login_screen_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_603087bd3b73c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495271/normal_604671b35b1c7.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/hirhehi/applock_fingerprint_password_gallery_locker_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_603bad6baea25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/centos_7_command_line_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/chocobo_racing_ffxiv_guide.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/23876035667.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/dasoworikifilawob.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/45674021765.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
    • 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_off0001c7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7B2 5396 bytes
SHA-256: a8ed0913fc22535705e3362ffa105af9b6757642627bc834c3ccf02a26be600e
font_01_sfnt_off0001da18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA18 6360 bytes
SHA-256: 5207a65a3435751039b2aac1da66c4d80bf5c20577ec7799c49b6fedc166208c
font_02_sfnt_off0001ee1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE1E 11008 bytes
SHA-256: 6cec5adb020531be70932cd36ac3cb02e3e38d408387a9de968b0da051e2a433
font_03_sfnt_off000213e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x213E0 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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