Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40f55486068ba16…

MALICIOUS

PDF

83.2 KB Created: 2020-12-21 00:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 68268bf7e494f614401eb683c25aba7d SHA-1: 5c5c37a1d24e2706ce08b49bd3298a587d9f1d48 SHA-256: f40f55486068ba16772b19d6c9a5c0794db0dd3f816c71d05d4ce9b095fc8d42
214 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 and routes users through malicious redirector infrastructure. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=ellis+irrational+beliefs In PDF document text
    • https://movidotibapokab.weebly.com/uploads/1/3/4/2/134265591/9f73f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_5fd9ea8b6f883.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/be61dbab-1fb8-4e59-aa31-9e715673d99f/philips_lumea_prestige_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1faece13-edac-444b-93f4-67ef414ae9e5/86012595645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc269b1-ccfa-4f5a-8615-a02edb268f9b/18722198063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9da87e7-6dc5-4357-b435-74e25530e091/femugadizidepadinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59595062-04dd-4510-a746-988b49fd7dfc/fuvipinuxekimofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f27dc998-fe50-4479-b465-04784bf5b327/42174873607.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/cheaper_by_the_dozen_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd87b93a-2ec3-4eb2-8e8d-895c41c75829/bowofekunumuwubugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fd45440-07f6-48ba-a92f-8ff4ce490474/23613276676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a6b757-7c84-41ef-bba6-00cb1ee34af2/12558525369.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/golomev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6670b84-a9d7-4c3f-aea2-edf3e16e542c/ketifanekexikox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d6660d-1e0e-4230-916f-96ef680a3be4/tudezowodapa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 3304 bytes
SHA-256: 0eee0c717c3fd98372df3d2c2f281b74e80190b34768fce79aa1701b8120bcef
font_01_sfnt_off00010963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10963 4860 bytes
SHA-256: 0f2d51dbdd798c85983963ba39c8d4f574933a2ce6e72ba62e5251e714801ddf
font_02_sfnt_off000119f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F6 10440 bytes
SHA-256: 94740228e8ed8aab9b997abb87357a2103e040036471f3812ab9eeac7f914cdc

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