Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd46785b2f0e8d33…

MALICIOUS

PDF

98.1 KB Created: 2020-11-11 10:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d9380bdfd1f9f2ab9f2f9439b1854d40 SHA-1: daea467e43f9ac96547cf3a52ef0ad524583acb4 SHA-256: fd46785b2f0e8d336d0db7807202b47505f54c97cc3d0acfef851c44652b335b
252 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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=nitro+type+hacks In PDF document text
    • https://lumozilupive.weebly.com/uploads/1/3/4/3/134336046/5f78fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f945e84d4b74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5fa840236eb2d.pdfIn PDF document text
    • https://lujetuzamuja.weebly.com/uploads/1/3/4/3/134372728/nemojo-lofidepuzaniz-labanorer.pdfIn PDF document text
    • https://sebiwijojemobod.weebly.com/uploads/1/3/4/0/134097571/newaponoretaza.pdfIn PDF document text
    • https://kifelulamexeb.weebly.com/uploads/1/3/4/3/134310841/sazezimon_zipegutoxovob_dibiv.pdfIn PDF document text
    • https://suwanozafedo.weebly.com/uploads/1/3/4/5/134587456/dosoxijuxerojawox.pdfIn PDF document text
    • https://wadexusi.weebly.com/uploads/1/3/4/4/134440973/1a4e244b.pdfIn PDF document text
    • https://ruworelolovifuf.weebly.com/uploads/1/3/4/4/134462917/fufataxagexepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f8dde7e75cae.pdfIn PDF document text
    • https://fofapabijutoza.weebly.com/uploads/1/3/4/7/134713913/gegavabugav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/79752261110.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/kipezomisopotunib.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6C 5124 bytes
SHA-256: 491f1e6801fa64839c95740c99019c4b92778c962d53cada5c40f5c19d841202
font_01_sfnt_off00012fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD8 2396 bytes
SHA-256: 462f5635b79f604c6d22a6ddc83a2514ef27eccc4eac6906ee322ebcfc1ea616
font_02_sfnt_off00013a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4B 8356 bytes
SHA-256: 4d9cf2426f9f3e8265a6abf6b9e9e83f0c3735cc8793cf21cb0f5561363a17c6
font_03_sfnt_off00015115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15115 12440 bytes
SHA-256: df7e63d85cd3369df7a655c21832e114bf2eed51a1950ba6176fc4d65cf1c0a5

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