Malicious PDF — malware analysis report

Static analysis result for SHA-256 560480cadb9f3f82…

MALICIOUS

PDF

76.0 KB Created: 2021-03-22 05:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0da5b465e5050a24b736ab5aa7b0f45f SHA-1: 0c39750d47c341c6410ae4111140a9536a99f25b SHA-256: 560480cadb9f3f820892a05054faa1d85e4475776af86f4fe0cf9d061931f76c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=grace+brethren+high+school+ca PDF link annotation
    • https://cdn.sqhk.co/kavuweduti/ehhhihd/scrum_daily_standup_meeting_template.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/tapuxetupepapavafim.pdfIn PDF document text
    • https://genefitagujutun.weebly.com/uploads/1/3/5/3/135392589/nominusami.pdfIn PDF document text
    • https://wunanowadile.weebly.com/uploads/1/3/4/6/134600652/mefiruf.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/Phciqge/tumblr_quotes_short_happy.pdfIn PDF document text
    • https://gunajogozezulom.weebly.com/uploads/1/3/5/3/135385825/8364919.pdfIn PDF document text
    • https://worudunomazife.weebly.com/uploads/1/3/1/4/131483266/katufositumobufeba.pdfIn PDF document text
    • http://pikejofopon.mypressonline.com/annihilation_full.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/gDJzAX5/mipumer.pdfIn PDF document text
    • http://kizunawinim.getenjoyment.net/air_pollution_and_control_engineering_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/vokipidelad/WBHYhgi/secondary_education_commission_report.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/4828433.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/zulogejugaduvuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_9eb0a4e59bf64994aa865e29f3a502b1.pdf?index=trueIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_dc8c65105ba0480db2e791aff278b6db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/lowutenotu.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/information_about_tomorrow_s_solar_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/best_bongo_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/walt_whitman_leaves_of_grass_1st_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/competitive_pricing_analysis_template.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_off0000eb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0F 5232 bytes
SHA-256: 23ffec078d756b81cd84b6fa2a0daa4d6ba0e7b4a8cec19b3c120605962fa5c4
font_01_sfnt_off0000fcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD5 11092 bytes
SHA-256: ff74a215f86c13e6bbe2d44ae75c4bd7cc1b4fc0ef2a7870cacaa73a5aab0de8

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