Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6195de0cc093eec…

MALICIOUS

PDF

80.6 KB Created: 2021-03-09 08:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c62731cae94fab9ca00a886627355d6 SHA-1: d781b61d33805e816c898d163eba8c54d35b44f2 SHA-256: e6195de0cc093eecfc28219cccababaa0ea8c7a4dc45c4076f8cfbf968658508
186 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 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://leonvi.ru/strik?utm_term=what+is+fire+and+ice+in+sorry PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444371/normal_5fd889bfd2d5a.pdfIn PDF document text
    • https://bilagezapa.weebly.com/uploads/1/3/1/1/131163658/6095094.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/6Tjhphi/vodedubokukeratujovifen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_60396f64b1942.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/hhyKfHE/disco_duck_song_wikipedia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_604431ead5d8b.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/wopatanowuxitoj.pdfIn PDF document text
    • https://cdn.sqhk.co/kubemuzu/ipgd5jb/light_up_christmas_wreath_with_timer.pdfIn PDF document text
    • https://moxeduve.weebly.com/uploads/1/3/0/8/130814104/wikapijareniguten.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_602da226217fc.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/jijahdH/16365675311.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/ehcjcgc/74523070327.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500677/normal_6002c65eca9d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_e45ce48d143b46fda3155579d083769b.pdf?index=trueIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_55a0bf2908114b5cba534397400b757c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisute/wibukimalovebabe.pdfIn PDF document text
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_8febe57948bc483dbd014f404d3f30c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xokebore/37068651102.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/ccrt_book.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_off0000fe71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE71 5192 bytes
SHA-256: e1af08249895e7ad0cef1747aeacffc4f05a2b730bf9eccf2b34619254fe497f
font_01_sfnt_off00011029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11029 10940 bytes
SHA-256: 2e390e3d5c176f01fafce16327ab31467ea2ea2cc2c6a999ea3050af53e11f15

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