Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6ef37392d537c9…

MALICIOUS

PDF

60.1 KB Created: 2020-11-25 11:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 22f35438686c1abe4fc6812b63bced33 SHA-1: de7501f1e05d0378a665594915af41efeb3deafa SHA-256: 8e6ef37392d537c912eedb200117bb2caa1bf27dd5e099cd18530b1fb3222b6e
156 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 0.9996

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
  • 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.
  • 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://traffset.ru/123?utm_term=best+buy+wifi+adapter+for+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f97501ab8fe3.pdfIn PDF document text
    • https://ronifevux.weebly.com/uploads/1/3/4/7/134737402/lisivixibe.pdfIn PDF document text
    • https://duxevuwelinabim.weebly.com/uploads/1/3/4/3/134353564/ac5dfa51e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5faa50c025563.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/dinigugaxej/the_little_drummer_boy_pentatonix_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/mixavuzanupawenajewetil.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/dai_cassandra_approval_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/72423358531.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/76804068647.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/tematuxobibevaxizufi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/70148948986.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/75109249864.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/healing_properties_of_turquoise_rocks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c1847f-b997-4c46-bbba-6c96dc3e900f/wikipedia_english_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/autocad_2018_book_in_hindi.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_off0000b250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB250 5448 bytes
SHA-256: c025f9d52351d7829bf779fb11acc33410cd3f8df277b2e2902e8c8f18f2d993
font_01_sfnt_off0000c503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC503 9080 bytes
SHA-256: 916fb713639439c2e3badce2720671d0037cb4feb08b553d578331e9e59ad245

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