Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5580375e58175c7…

MALICIOUS

PDF

87.0 KB Created: 2021-02-20 15:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6d1ac009ce05bd2314f1da6f5b122b6f SHA-1: dc46072f3496630f2b15792b764a171b235807dc SHA-256: d5580375e58175c7c277ca71903eaa34ef80edfe607c63eb587664bbea115567
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 0.9995

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/aws?utm_term=how+to+warm+up+brie+with+jam PDF link annotation
    • https://cdn.sqhk.co/wenewojufaj/igAggh0/89647099395.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/jbghjgv/shelter_in_place_california_lifted_date.pdfIn PDF document text
    • https://cdn.sqhk.co/jarutejip/GajamEW/star_wars_vintage_collection_mandalorian_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/phhT9bo/tubemate_video_downloader_for_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wokiwife/ThidhiG/nezavoloxanotanune.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/ieHjjic/23686537448.pdfIn PDF document text
    • https://cdn.sqhk.co/pememobuwir/iegfXq0/76659312584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://norilonabu.epizy.com/35354916038.pdfIn PDF document text
    • http://tijoduv.epizy.com/passive_and_active_form_in_english.pdfIn PDF document text
    • http://deravamosu.rf.gd/11457556912.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/showed_you_my_answer_me_meme.pdfIn PDF document text
    • http://bajipogijos.epizy.com/54595672656.pdfIn PDF document text
    • http://zorogeloma.epizy.com/wulukuxesugug.pdfIn PDF document text
    • http://pezomovororiz.rf.gd/men_s_health_fall_fashion_guide.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 6408 bytes
SHA-256: ee8573f4b8729d40857cce5123e56842d9f9891846ac9abe07c1bf7dfb0d8435
font_01_sfnt_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 4896 bytes
SHA-256: ea8079f0afaa71b5d27b22b79181126c52ac1971760f730b0e629c7b5c2a8136
font_02_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 11276 bytes
SHA-256: 156a1973d0c8662b149bf34c2ae891599b4631e10156c15cf8fe3cb9a47ca15a
font_03_sfnt_off00011c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C86 10472 bytes
SHA-256: 4b14765e7a74161cfd75801434498ebbf8b96688414abb49f5fd658c88bbb00a
font_04_sfnt_off00014022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14022 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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