Malicious PDF — malware analysis report

Static analysis result for SHA-256 774dbbdeedbc4d6f…

MALICIOUS

PDF

76.1 KB Created: 2021-02-17 02:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8c59b35a2bff6adabd6d7783e1b3ce3d SHA-1: 48ed2bcbee38034d19d21c9e0a1535cdab4d2318 SHA-256: 774dbbdeedbc4d6f4315f3ae15f231c0c45367b77e4e44c877e6b4e37e704776
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs pointing to disposable hosting services like weebly.com and sqhk.co. The primary purpose appears to be directing users to potentially malicious content or phishing sites, rather than delivering a direct payload within the PDF itself. No scripts were extracted, but the extensive use of external links suggests a social engineering or redirection attack.

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
  • 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://baarspo.ru/123?utm_term=geometria+analitica+dello+spazio+formulario PDF link annotation
    • https://cdn.sqhk.co/segenoliz/QhgRigR/visemojegesidev.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/cifgUgg/play_tube_apk_2020.pdfIn PDF document text
    • https://fibupodofakakov.weebly.com/uploads/1/3/4/4/134496100/3342387.pdfIn PDF document text
    • https://cdn.sqhk.co/koxajavu/nhdHThf/jezubeladuzixapovunizasu.pdfIn PDF document text
    • https://fupefodomixeja.weebly.com/uploads/1/3/4/8/134889506/62e6c9869d665.pdfIn PDF document text
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/0d9223e3.pdfIn PDF document text
    • https://dilomosef.weebly.com/uploads/1/3/4/3/134316650/b114f0.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/luzipose-lalololub.pdfIn PDF document text
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/0d805b7e329f5f.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/ifgiAHX/duxopuluvare.pdfIn PDF document text
    • http://draiwenstore.online/happy_birthday_to_you_sheetal_imageouui1.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/pujelazisuvo_nakidakif_zepovake.pdfIn PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/9679766.pdfIn PDF document text
    • http://sportplays.ru/xanafeluvewifazozebenureblo8mb.pdfIn PDF document text
    • http://topcreditreport.info/88708235737hmak6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_5fdc8745749b3.pdfIn PDF document text
    • http://italia-doc.fun/9474400015rl7fq.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/fGjahax/bozilaziligalub.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://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_off0000dc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2F 5264 bytes
SHA-256: 2fab000ac96af8eade476f5743e00fe0b94fa78e96efe4f551db2ee58a93a4a9
font_01_sfnt_off0000ee01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 11244 bytes
SHA-256: 024717a1076524bbce3b30774ce6945c8cb14f16ab96d20e1364ef43c9df3498
font_02_sfnt_off00011291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11291 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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