Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0496c644462679…

MALICIOUS

PDF

74.3 KB Created: 2021-02-19 12:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0e34d077248c918728e5c03b35fd35ee SHA-1: cb815524af9ea8c2d9305eb63213d1773bd41453 SHA-256: 6b0496c644462679ea3bf7ae649c076d868e465cb7f2b28084c43894d4134019
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as part of a link farm and redirect to malicious infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'crystals in western australia', likely intended to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+find+crystals+in+western+australia In PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/cf86d1fc.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/Bjchjhj/gulerogopemababis.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvasovosew/ASdjaoM/kuvinozerese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_601717c72f4c1.pdfIn PDF document text
    • https://tizidebiwefixim.weebly.com/uploads/1/3/0/7/130739379/semejumuzilus.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/magasakorerib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464052/normal_601098a6e13ca.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/fwNjjge/escape_plan_cast_1.pdfIn PDF document text
    • https://rusofejez.weebly.com/uploads/1/3/1/8/131856127/foteruvisix.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/vuforewebub/learn_cakephp_with_unit_testing.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/batman_arkham_asylum_pc_size.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/19492419768.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/crowdfire_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/dd_players_handbook_audio.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62A 5052 bytes
SHA-256: e64aa99335f0a593d9f4f21f2b3fb9a7cfb011240e54fa11da3d15e85eb85b9e
font_01_sfnt_off0000e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 10920 bytes
SHA-256: cba2ec6d806dd8d984b0bc35a1609e22bc039141f045147349002abdee0f92d3
font_02_sfnt_off00010c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C98 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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