Malicious PDF — malware analysis report

Static analysis result for SHA-256 34412912cde0d1db…

MALICIOUS

PDF

74.2 KB Created: 2020-11-18 14:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d1c640b5962e8c30588c4a7925e8d439 SHA-1: 7824d03636c1f4ce83bb58aabbf0ef3f75fafc50 SHA-256: 34412912cde0d1dbe405a2452fcc96f1f7f1df34c777a47c702afa0d42349fd2
244 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 0.9996

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
  • 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.
  • 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.
  • 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://gettraff.ru/aws?utm_term=apple+live+wallpaper+iphone+x In PDF document text
    • https://bezowaki.weebly.com/uploads/1/3/4/6/134611163/fonofexizumovu_sirifalifizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f8912b9437a3.pdfIn PDF document text
    • https://roxupabepali.weebly.com/uploads/1/3/4/6/134611875/70951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408190/normal_5fa78c446dc54.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/badeniwetu.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/82408ca.pdfIn PDF document text
    • https://sositero.weebly.com/uploads/1/3/4/3/134389363/fakav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417025/normal_5faa0cb0d5299.pdfIn PDF document text
    • https://warakamaluxib.weebly.com/uploads/1/3/4/3/134378328/96e371f7b8d.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/9e87f48b-4779-48be-9744-2c6e4729ee3b/pidapofasibozozotepanik.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/beef_tartare_nutritional_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e01dc607-094a-4634-a0d6-65b638bc0b50/metodo_de_routh_hurwitz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D5 4940 bytes
SHA-256: 928fd69b553e98438131c528a898a9d08440c610741589f8df2c3d382aaafde3
font_01_sfnt_off0000d7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AC 1888 bytes
SHA-256: 0e0866f7fac32777933161d3dc57fcd9bd4ee770b3f2b9a1c49767ab9067735d
font_02_sfnt_off0000e0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CF 10764 bytes
SHA-256: 191900641237b9b805bc6feb6303f95031d4710a7b88c53d00bb137709db7cc7
font_03_sfnt_off000105e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3

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