Malicious PDF — malware analysis report

Static analysis result for SHA-256 1517e88c0d83391e…

MALICIOUS

PDF

90.4 KB Created: 2021-03-08 19:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f525430882cb5464903333af5a997ae9 SHA-1: 3880e658fc624e33d77a6809343e4aebfa4ae908 SHA-256: 1517e88c0d83391e7f3a2cb8a2e223f933bce2b5e035dbc7f81f567e3496ac5d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://ponafet.ru/123?utm_term=world+of+warcraft+vanilla+leatherworking+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412584/normal_600037624fdcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_603ff3359eda5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd63c7436b86.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/ihhaRZy/ios_14_control_center_blank_icons.pdfIn PDF document text
    • http://muldwych.com/balirotedalasejo7xpv0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470687/normal_6038fae789cd5.pdfIn PDF document text
    • http://lnstagrambusiness.com/principles_of_virology_textbookfwfc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479212/normal_603c4372e7360.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418584/normal_60090c612eeb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_602df6215fede.pdfIn PDF document text
    • http://mosdendy.store/unity_webgl_games_onlinelihqe.pdfIn PDF document text
    • http://bella24.xyz/pasteurization_of_milkj9ait.pdfIn PDF document text
    • http://zelopaqq.xyz/dofobojuronamidogug7rd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_603023d6e404a.pdfIn PDF document text
    • https://cdn.sqhk.co/wekababu/dha77HU/kululipatagusorusaravel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5fd83ff60a5e4.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/biology_5._2_limits_to_growth_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/10590795815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8b66e4-bc0c-41f5-9faf-e89009493492/how_to_find_complete_the_square_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73575745-5d68-453b-8b6f-8b1eb9ac5f04/42442351689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db94fbd-6532-4a94-be08-ad60939b11e8/tezudevukexawolofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cddccb72-c053-4d27-a1bc-ac010f3dc9d8/kujevira.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/76008969425.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010992.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10992 17044 bytes
SHA-256: ff4fa99a7092d0590bde22bc6028237464ca2db2cb7c09d8183e194a141e0eba
font_00_sfnt_off0000f75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 5332 bytes
SHA-256: f42562780ccab2f3792d74bfcac48f10da75d39663efbefadfddddade2536d2a
font_02_sfnt_off00013767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13767 10572 bytes
SHA-256: 705efe120bb6e2b0eedd1288882d4fb10796689f2526fa1b9a5369e5ed0dad24

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