Malicious PDF — malware analysis report

Static analysis result for SHA-256 c266b9b61e0b2efb…

MALICIOUS

PDF

76.4 KB Created: 2020-12-27 20:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 20114daafd114372e2797238364781c0 SHA-1: 6601824447cd420c3fa3e09b49908c5306af7b79 SHA-256: c266b9b61e0b2efb877fbe5a657b0a507b75a201b160e99cd9d817b8b171b46b
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The presence of a "download" button lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/aws?utm_term=pdf+to+word+editing+file In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f8b0ea1c67f3.pdfIn PDF document text
    • https://kepelawurolunuz.weebly.com/uploads/1/3/4/0/134017158/kisenipaserij.pdfIn PDF document text
    • https://pozuzedik.weebly.com/uploads/1/3/4/6/134668333/fozatafavulegudim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_5fb7822ab9c3e.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/kinafegenuvux-laxipigit-roxuribogaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_5f98ab21033ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5fbd848a13d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_5f8fcf4359516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f8ef42d78cd9.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/zigabituxefepi_vumuwusevoriku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/68796457231.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/adverbios_de_frecuencia_en_frances_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224679aa-6672-41a9-8639-088b61b1fca3/bolafobikulo.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/ericsson_mobility_report_november_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/amazon_codes_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunoje/zupiditijizopasiwepov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a221997-e33b-453f-8a79-b6bbbb4253cf/30285989142.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_off0000efdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 4780 bytes
SHA-256: 2e833172a75d7dfd64c541e8c71d52d2a261a0ccabc200fd5a1c880091c43de9
font_01_sfnt_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 10596 bytes
SHA-256: 82c42e5e42cffa7e24d921004fa471c26387a48040836b30f6f7a1ce721d0849

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