Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff0b0375f75db48…

MALICIOUS

PDF

78.4 KB Created: 2020-12-01 23:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 966043e46988deea6ebe318734ff0e6a SHA-1: 2185d03ce1aa32066075f6066f8c3f4e23182434 SHA-256: fff0b0375f75db48fc66d03e085448ae045c658e1538c37d5ace663f8aa50082
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=good+looking+loser+bathmate+routine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f87217c9154b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5f985dd8a8f4f.pdfIn PDF document text
    • https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/319066.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366982/normal_5fc51e4947d6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462368/normal_5fbc058e59dd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gidibesuxi/london_bridge_hd_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/chrome_apk_download_for_pc_window_10.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/93077336959.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/order_of_the_lion_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/alexander_tamil_film_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/69151155189.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/burnout_revenge_pc_full_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/rozifogozowarapofekugoko.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/88259369710.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/famous_people_that_were_in_band.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD284 5828 bytes
SHA-256: f2855f184d91e54740bd684568046b34e94ac123ff9d7b1cba8ff1e49cc64877
font_01_sfnt_off0000e645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE645 5356 bytes
SHA-256: 25b95bcab7129100e5d1cb8045fc995cc6e339796b5a61e8d663c32148a95123
font_02_sfnt_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 11000 bytes
SHA-256: 1321fd41ddaf468070d4a64be4cd5c120a3a4ee5cb1b4496475b879fa1b2179d
font_03_sfnt_off00011db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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