Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b17cf60da0f55be…

MALICIOUS

PDF

68.6 KB Created: 2020-12-17 20:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8f33f13dd56e8938504096968a95d94a SHA-1: 2b9bef93a2dad5e8979926c69222ed6eddf1471c SHA-256: 5b17cf60da0f55bef9939ac460c3253a759865cfaee41670022170a98037a6d8
194 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically identified as a redirector for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary lure appears to be a 'free download' or similar offer, directing users to the malicious URL.

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=big+joe+pool+float+target In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450719/normal_5fcefd02986bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_5fac554a9cbfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424647/normal_5fb7d8ceddd12.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://static1.squarespace.com/static/5fbffb205e8e827d4288adb3/t/5fc4132a1972c46e3c1d0fd9/1606685482250/final_fantasy_brave_exvius_lapis_hack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdefc37acac6192a85759f/1606283204328/bni_noontime_networkers.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/aldi_district_manager.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5364b116eb00e3c68284b/t/5fce9b9c1fb94b45003affc1/1607375772771/haitian_radio_stations_in_south_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/bts_fire_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/compare_rational_numbers_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfc558cb11b25c09bfc53/1606220885863/zojumukutivexujiwani.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/service_manual_for_troy_bilt_bronco.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/modded_bedwars_ps4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E5 4700 bytes
SHA-256: f6eeeb5b1d073b39e4b75f1070cff953038325ec07bbcf647087e6e252fee65b
font_01_sfnt_off0000d6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EF 9668 bytes
SHA-256: bc282097fa66b66248ad57a1393f6badc894a9c036add67892c53f120b3172e3
font_02_sfnt_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333