Malicious PDF — malware analysis report

Static analysis result for SHA-256 a265976043d74fc4…

MALICIOUS

PDF

78.2 KB Created: 2021-02-18 23:49:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d3fb2c67dc03fac5210baf29a9e6a34f SHA-1: 6f4e2e0daaf077f5b22fea1d55f468365d787522 SHA-256: a265976043d74fc421a28e563b4df2a71cadc9cafc9f89f0380fff808a59c012
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=jedi+tunic+tutorial PDF link annotation
    • http://xsale.trade/cae_test_1ikmz0.pdfIn PDF document text
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/8402482.pdfIn PDF document text
    • http://ewop.space/scrabble_word_finder_board_lettersrjdp4.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/3b92c.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/kebitivoxe-zuvaluwu-wuweduwab-wupotilisavogu.pdfIn PDF document text
    • https://pajowivi.weebly.com/uploads/1/3/4/9/134904739/9918667.pdfIn PDF document text
    • https://tegupovo.weebly.com/uploads/1/3/0/7/130775278/07dbc412fb38cfc.pdfIn PDF document text
    • https://dumejolizaxoko.weebly.com/uploads/1/3/0/8/130814858/7124549.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
    • https://s3.amazonaws.com/jamuluvuvava/backup_chat_whatsapp_dari_iphone_ke_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/business_plan_outline_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/definition_budgeted_cost_of_work_performed.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/multiplying_fractions_worksheet_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/responsive_entertainment_website_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/82987206689.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_off0000d5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EC 4628 bytes
SHA-256: 5588516b0e8ce6bb25878cd7e30b3366c3758c6cbe954a98722750ac214c1314
font_01_sfnt_off0000e5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 10024 bytes
SHA-256: 87e5e5b9e84a269335284bdeab52dee97aa9c2330cc1f9edb9013dc174cfb6a7
font_02_sfnt_off00010822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
font_03_sfnt_off00011dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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