Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd4f4f774df0696…

MALICIOUS

PDF

80.1 KB Created: 2020-12-20 14:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 28f5ad5731a3ee11e850f8302ad1c86d SHA-1: 903b118835d6418ab10a4857d8799b3a0b878fce SHA-256: 5dd4f4f774df06969af435dfd0195ba515c2095bb838aeedada92e68cb999512
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a significant number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to potentially harmful content.

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://traffnew.ru/strik?utm_term=restaurants+inside+nationwide+arena PDF link annotation
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/5876947.pdfIn PDF document text
    • https://tugufotekaluxaz.weebly.com/uploads/1/3/4/8/134883762/bowisaruvumo.pdfIn PDF document text
    • https://raxelapanaf.weebly.com/uploads/1/3/4/7/134746791/wazafo-wutuvusugasejis-taxabun-perow.pdfIn PDF document text
    • https://bimebupeku.weebly.com/uploads/1/3/4/7/134715010/ninolirobu.pdfIn PDF document text
    • https://daxefumusadaja.weebly.com/uploads/1/3/4/7/134763928/figowa.pdfIn PDF document text
    • https://somanenor.weebly.com/uploads/1/3/4/4/134472611/6181adb78b43de.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/2bab8bc8ccd02.pdfIn PDF document text
    • https://kovumagamu.weebly.com/uploads/1/3/4/5/134578336/xuwemirewifisa_zirudujiloge_muvivofinirulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380682/normal_5fcf3f2ade310.pdfIn PDF document text
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/ladifej_xapebixapud.pdfIn PDF document text
    • https://kafedujewerom.weebly.com/uploads/1/3/4/6/134622586/ropipamaze_dutamobiruw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_5fae91f185fa4.pdfIn PDF document text
    • https://fonomirul.weebly.com/uploads/1/3/4/3/134336784/kasasutorakemoju.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/7124087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe087abc819f1cf49fa04a/1606289531372/acolyte_leveling_guide_ragnarok_eternal_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0bc8348-6af1-4f04-badc-88ed0f786bdc/oracion_a_jesus_de_nazaret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67bc1334-8fb4-4983-99f2-043068b1b194/24156271409.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 4884 bytes
SHA-256: 1ea797c127960d48b885289509f7e9e665754607afe7d404aff5b626b38ddeb7
font_01_sfnt_off00010a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A61 13176 bytes
SHA-256: e0a378d2335bea7f6ca618ef3676771245a70e3af6f1854e3c67d77571fd9417

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