Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6a38b5e6bc9269…

MALICIOUS

PDF

80.6 KB Created: 2021-03-26 08:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b0737d9cede8785ead3690c1db2916d5 SHA-1: 9cd3d61ba055f56c37f3af6a677209477febcfa8 SHA-256: cb6a38b5e6bc926988bd40f4c3a38ed503eb75baee1b68e7c25019cc2826b731
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the PDF structure point towards an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/strik?utm_term=integrate+cos+x+from+0+to+pi PDF link annotation
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/sibibidejakavinekeji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401994/normal_60057895ef718.pdfIn PDF document text
    • https://wawokosekipazas.weebly.com/uploads/1/3/1/4/131452886/3664680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489583/normal_5fe1c0e7586ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413374/normal_60090e957adec.pdfIn PDF document text
    • https://zirodamabesad.weebly.com/uploads/1/3/0/7/130740068/946f490a93e7913.pdfIn PDF document text
    • https://fenuligor.weebly.com/uploads/1/3/2/6/132695430/7465981.pdfIn PDF document text
    • https://kivinogafuwej.weebly.com/uploads/1/3/4/7/134702495/1627632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_600223de690ca.pdfIn PDF document text
    • http://vawefisalob.22web.org/how_to_clean_dyson_v6_motorhead_filter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_4d7a0cf495644f19ae3baa9687cef67b.pdf?index=trueIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_49b70b1f1136443da1ffc65e2bd5456e.pdf?index=trueIn PDF document text
    • http://tawenaxogiminax.epizy.com/majibovar.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_b4b6e3d4119043c3a983976deacb1a23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14132ae-ff92-44b9-bb68-b10f856a352e/gujivav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0e162c-3cf2-4676-83a8-bb43174384a0/15762371178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96ab37f1-1f61-4ce6-b219-d29033ccede8/gopro_hero_4_silver_update_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcaa360a-4dc9-494e-8a2e-530abb56b9f7/30459210430.pdfIn PDF document text
    • https://baad1762-ad72-434c-be9a-9de7d8068d01.filesusr.com/ugd/61395f_33dd954330374185b55ccc2c65d33821.pdf?index=trueIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_b27a25eb0089467790e669846c8251b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae23c17-4dc2-4b10-8bf1-6de85fb84368/what_is_the_atomic_number_of_first_20_elements.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 5452 bytes
SHA-256: 9389b61a89301c25b3750afbcf3c8f4f95e32b74567e2cc27fd438b83abd2bd4
font_01_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 13708 bytes
SHA-256: 92a5d6e487631f2766a5c3d56c27e3f39a3fbf92da7ae2e41771a7f70882d8a3
font_02_sfnt_off00011ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE2 16212 bytes
SHA-256: 8e6e5f368062d879a789ce98a5a27a6218db3c90dd466978ea37f262d66fa973

Open this report in the interactive analyzer, or submit your own file for analysis.