Malicious PDF — malware analysis report

Static analysis result for SHA-256 932d6513a923f9d9…

MALICIOUS

PDF

104.6 KB Created: 2021-05-26 16:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f238ba60619e9ca5599e5c1ec1d6b7ea SHA-1: cf5ab904ae768487d3de3ec215b47cd51d47bd61 SHA-256: 932d6513a923f9d958281fc9a324877a5e1bb31b5dc7c56555779a5156cf48fe
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous external URLs, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to potentially harmful content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=mao+zedong+and+marxism PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458829/normal_5fd1f313bf5b7.pdfIn PDF document text
    • https://wezusuruga.weebly.com/uploads/1/3/4/0/134096163/kikatala.pdfIn PDF document text
    • https://fosubenasodu.weebly.com/uploads/1/3/4/0/134097760/nirefosaxotexiwid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fd091f885e37.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/pivavet.pdfIn PDF document text
    • https://vabijerokajesi.weebly.com/uploads/1/3/4/5/134595953/ed71e4.pdfIn PDF document text
    • https://xutawolovunoka.weebly.com/uploads/1/3/0/7/130739399/ff03c9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_60462e1835f1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392191/normal_6000103985073.pdfIn PDF document text
    • https://wanerogexem.weebly.com/uploads/1/3/4/1/134109266/vaxobi-kanagovufub-puxejepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_60264d06d7f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_605f778db5080.pdfIn PDF document text
    • https://dibufasefeduvit.weebly.com/uploads/1/3/5/9/135975636/5d1daac1f6f7088.pdfIn PDF document text
    • https://kamojadatuxam.weebly.com/uploads/1/3/5/3/135316538/mejovido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_6050d7a3ad872.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/7866976.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/bbd4853a-4090-46d5-b50f-61c6b45c5285/marine_safety_center_technical_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32155e0e-2650-42a5-a2ad-62aa162faa45/xorivotul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7881743-35e9-4bdb-9f4d-1e17d838a847/9046972954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f98dbe-4ae2-4505-b172-ed2e76eb50f2/gosuvozokusogemafako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a06057-cacd-4600-b552-5a4f4667f450/lugirowifiwonimikuwuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3e15d7-fbd3-4d48-99bf-b15eb8f78ac9/vodozivipafudidap.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_006_off00017d5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17D5F 16540 bytes
SHA-256: 3e83ed34eed6e00b015c5f7122b22db12e0780c24717658958273b2a41147fb0
font_00_sfnt_off00012b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B10 6900 bytes
SHA-256: cdd669b2424b3c7914957cfa61b684533c0387926dad9604bf6f8180a5ce799a
font_01_sfnt_off0001420b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420B 5236 bytes
SHA-256: 7d4193ea48bef8277619fe078213a904042e51f285dca827a1ba0388dfe585a1
font_02_sfnt_off000153dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153DD 13788 bytes
SHA-256: ea119f74223d877acdb3869b5d31be410f49307e719b1bdbecde69d23acf9416

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