Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c135871c0b49830…

MALICIOUS

PDF

70.2 KB Created: 2021-02-13 02:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8a4940eb42e9055bff43b63c51119913 SHA-1: e1c4435a055e25880fc208c789bfe44ed2e4d66c SHA-256: 7c135871c0b49830fd83e2b964b2bd3d4dc06ecb4a03d0edd63b2c26964e24d4
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=empirical+formula+worksheet+key In PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/pikapovovebifip.pdfIn PDF document text
    • https://ropexosuwewi.weebly.com/uploads/1/3/1/3/131380205/332810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450256/normal_5fe4172387082.pdfIn PDF document text
    • https://mumanewuneju.weebly.com/uploads/1/3/2/7/132712109/muvagurijebojuseva.pdfIn PDF document text
    • http://tedusoxunola.22web.org/legal_disclaimer_form_template.pdfIn PDF document text
    • https://gakefutafo.weebly.com/uploads/1/3/0/7/130739004/bapanovuzo.pdfIn PDF document text
    • https://terifebi.weebly.com/uploads/1/3/2/8/132815785/wejewapiwevadele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494883/normal_5ff4dba385fe7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475872/normal_6007c7c1e051a.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/17585787042tssuk.pdfIn PDF document text
    • https://jesokawafaz.weebly.com/uploads/1/3/4/6/134626724/4250943.pdfIn PDF document text
    • http://legendnat.space/965816682452e15x.pdfIn PDF document text
    • http://opticsystem.website/miocardiopatia_dilatada_etiologiamg2yx.pdfIn PDF document text
    • https://lurenosofen.weebly.com/uploads/1/3/0/7/130740325/c08de9b2ff99dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418762/normal_5fe3d6ffac346.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://gubilozav.epizy.com/ropavi.pdfIn PDF document text
    • http://jenizigigeno.epizy.com/asnt_level_2_book.pdfIn PDF document text
    • http://pogogap.epizy.com/cadena_de_valor_mckinsey.pdfIn PDF document text
    • http://gevegure.rf.gd/old_paper_background_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EC 5248 bytes
SHA-256: d3cf8212f47db3a2de6b4c6e426362c6c0b51ac8be0ed44f335f3754ea35587b
font_01_sfnt_off0000dbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD8 9800 bytes
SHA-256: fb6f8053c070df5350734d2c7ca6a145902828a4d07c51535d166101354f56aa
font_02_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e