Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac390d66e628d01e…

MALICIOUS

PDF

77.9 KB Created: 2021-01-03 07:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 91d66a6edecbed77b963a39ea584108d SHA-1: e268d77fbfb802c5d823e27028e756b4e729c576 SHA-256: ac390d66e628d01ef498a208e7c1e7f6db866d8e374b990823ed6c20d9106425
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=friends+english+song++mr+jatt'. ML classification also strongly indicates maliciousness. The presence of embedded URLs and a 'download button' heuristic suggests a lure to trick users into clicking the malicious link, which is characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://gettraff.ru/aws?utm_term=friends+english+song++mr+jatt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477379/normal_5fc37dd199777.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/1kIib19/71835246957.pdfIn PDF document text
    • https://cdn.sqhk.co/fojupigek/jGjgQJJ/pocket_knife_collectors_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedepobe/rhchcih/gardenscapes_hack_stars_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8747366b169.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471682/normal_5fcea262c51e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417983/normal_5f9fcb8ee1098.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/figaI6a/dewokodixazise.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/aVjihbh/21033392389.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/jfHjdij/rules_of_survival.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/zvRehbX/superstars_wwe_anime_wallpapers_hd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/49761b8a-6fe9-40e8-b763-b14d010b6914/octavia_butler_fledgling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b8b138-0d5c-46db-ad8a-916b6078422f/hot_mail_google.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d296dc-fa1c-4a82-a26f-ab426f69661e/fundamentals_of_financial_management_concise_7th_edition.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

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_off0000daf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF2 5268 bytes
SHA-256: 58ea41e53b4848a23faaf4c554de556558fb0533f43d3712c332d0d12b128ebd
font_01_sfnt_off0000ecb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB3 11744 bytes
SHA-256: cfb0e8631781a40a41daabf5c850115c11b7d05fdec523585bb577d6d18ac729
font_02_sfnt_off0001141e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141E 16120 bytes
SHA-256: b8fa99db91b4e2a38fb01ca4f8dfd1970d271bfdaf7323161a8b02e369b8fc98

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