Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f72ff4843e69a3d…

MALICIOUS

PDF

68.9 KB Created: 2020-12-16 12:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 482f6700b02e0baf1d5bfecffcf49a19 SHA-1: 9e43941c952543b09ac9aaa4d2e3732c1bd1a42f SHA-256: 2f72ff4843e69a3d2891d6eec5da89988e19ee1dafe45305edb2957d53dc6266
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to external, potentially malicious, content, and a machine learning classifier strongly flagged it as malicious. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/123?utm_term=bill+nye+the+science+guy+electricity+current+worksheet In PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/xuxinasi-kumubeja-laruvowelikejal.pdfIn PDF document text
    • https://vaguvijag.weebly.com/uploads/1/3/4/6/134610999/9473857.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/lolofigage.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/8285021.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/bozepi.pdfIn PDF document text
    • https://fepuvagugi.weebly.com/uploads/1/3/4/7/134767339/zeruko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f27458-f863-45b9-98e8-4d1eff6e172d/74131063791.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/irish_former_world_featherweight_boxing_champion.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/punasezexurekinam.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/tujino.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b6c78787e8798971b212/t/5fc331151972c46e3c063047/1606627606462/slayer_staff_e_vs_staff_of_the_dead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce212e24-e860-4cdd-af65-336c8b961a0b/laxuviremesosov.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/alabama_state_income_tax_form_40a.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf509cbc819f1cf4cf1faf/1606373533133/xafaberoxinuwodon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f580ed-f011-44e3-a56f-dc44b276aac8/analyse_s2_smpc_exercices_corrigs_p.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_off0000d146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD146 5156 bytes
SHA-256: ba24f6690290107539b048a6298c0472f36c708f55bb162141ab3800c30808be
font_01_sfnt_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 10388 bytes
SHA-256: 2286f44cba3af2b3a61cd7562b24ed496455a21c4b3ebf68f97812b8f745a196

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