Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a07f919737b39d…

MALICIOUS

PDF

89.5 KB Created: 2020-12-26 02:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 51112d9c6c5be5e0f94b1f67f743f545 SHA-1: 7c095b334079d6e0696e1f488b99da2108b34f7a SHA-256: 41a07f919737b39d18145b8a1e64f26f6c4198fe6ca159f443ba66d75efedb7c
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the presence of numerous links and the overall structure indicate a phishing or redirection attempt.

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
  • 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://cctraff.ru/strik?utm_term=scary+ringtones+download In PDF document text
    • https://nakoliveb.weebly.com/uploads/1/3/4/5/134503524/vekemaki.pdfIn PDF document text
    • https://jonurimexiv.weebly.com/uploads/1/3/4/3/134321783/476e0c8f9f193ac.pdfIn PDF document text
    • https://cdn.sqhk.co/dagizonu/hbghnM7/38064501199.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/593d6470b3b.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://uploads.strikinglycdn.com/files/84b7b7e4-0ed2-4b0a-a517-2ef39420bb25/sonic_oc_maker_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80b8e7d-5cda-4912-ae4c-ffb38b84eca6/xazorasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91fe1e1-c3b4-44be-a8c2-8b79f0a78c0c/general_motors_mission_statement_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20186afc-6673-4359-8194-d99850f61351/15550559805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac27ed7e-7896-4070-9d67-4eea7a5f049a/84399147005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac1f850-6598-4d20-919e-b83baec534d5/swot_analysis_of_self_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32bf1ac-cf34-45e8-89ed-0a56f96c1506/atividade_com_verbo_to_be_5_ano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841deaf3-090a-4dcf-a7dd-7b594cc4da95/tupezuranidunas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77cd9bff-8cb0-42ec-bb19-f726ab081a4e/cane_corso_breeders_in_washington_state.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012db3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12DB3 18432 bytes
SHA-256: 99723519cab75370d9047a47b6aa67eb0b94e2af21d6461b108d7400a7f3faab
font_00_sfnt_off0000f8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EE 5192 bytes
SHA-256: 0740c1b7f423646c75e4d96dc85fc1026dd646d22c2e7c21189e94441adec255
font_01_sfnt_off00010aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA6 10260 bytes
SHA-256: ae37a8febc18f107fcc492162436084387e483a515c6b72b6c23693e7945d23c
font_03_sfnt_off00014a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A89 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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