Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f91244c3fa9a16…

MALICIOUS

PDF

71.7 KB Created: 2021-02-13 15:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9df350bf7113b4e0b48a1ac23e1c23db SHA-1: 9bc9d6c09fcb0736123be020164061041cd90d8f SHA-256: f6f91244c3fa9a16334ac8bf456ff4c3e51386b45de7f4b115181fc19d4bfea4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://druttle.ru/123?utm_term=fine+arts+center+greenville+sc PDF link annotation
    • https://cdn.sqhk.co/niserutom/C6jaxih/54642302210.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/hgSDHw5/mesupulepovoxuroxuwexix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476436/normal_6011c08882972.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/hePmMhg/59338688502.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/jehche1/mefipabamiwu.pdfIn PDF document text
    • https://nedidibizexoba.weebly.com/uploads/1/3/0/9/130969065/tizobidedalatek.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/dhbgcje/the_word_collector_free.pdfIn PDF document text
    • https://cdn.sqhk.co/turomixo/i9ygioG/26010300315.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/jaJSshg/snake_2000_classic_mobile_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xidujefonari/jefHjf9/4675217183.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/Y4NjbEp/zusubobidunopenedosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xonefepuvimami.epizy.com/mine_bitcoin_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/safovuti.pdfIn PDF document text
    • http://lizuratudesaxop.epizy.com/jasezoxivowov.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/wallpaper_4k_marvel.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/69611455661.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_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 4980 bytes
SHA-256: 59fd29b30a831e27858e95cfcf17dcc4648d8c78325b4bb004d6c8d339d717c9
font_01_sfnt_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 11932 bytes
SHA-256: a13d18adc989c058a31f369f90c5c037e4a9679959f922f466dfb59b6fbe89d4

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