Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad5bcada18f9547…

MALICIOUS

PDF

80.3 KB Created: 2021-01-06 14:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 11fbc2e0ef2778b0cfa79f381a4bdaca SHA-1: a5b58a32fea7e730f2ce555f525a685679bc978e SHA-256: fad5bcada18f9547c8f3994d8a7fc4528ac4aab050e9f4d2653bb7319a512e0f
254 Risk Score

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://traffmen.ru/aws?utm_term=car+simulator+game+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5fd3528d128a0.pdfIn PDF document text
    • https://daxuferawul.weebly.com/uploads/1/3/4/5/134592581/43bd01a4e.pdfIn PDF document text
    • https://cdn.sqhk.co/tonuviwa/bhgPLhg/where_to_buy_super_shooter_water_gun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5fdb80d346619.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefoveniri/liggdgh/wexuvewepuso.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/bulalowisu/bsrm_staffing_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pezufatexo/roxitopurofisagemu.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/jepasasazat.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/copper_ii_chloride_and_aluminum_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f4630c-3233-4017-9b88-45668af59907/xogajoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986d8771-4e18-492e-9907-12a806fecfb6/bipazemolawulini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2241f28-dfa1-4984-8c27-8e4ccb95ee25/where_was_grease_lightning_filmed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa660546-e134-467a-87ba-3ad964e1b03b/pharmacotherapy_casebook_a_patient-.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/pathfinder_kingmaker_nok-nok_alignment_shift.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/joomla_template_j51_renovate.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_off0001002e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 5248 bytes
SHA-256: 95d35d9a3251c33d10bf1cd699876103fca58973ed69417a7b53c6437d1a0765
font_01_sfnt_off000111f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F0 10144 bytes
SHA-256: 7defd5837b9641270b883f660b9acb131b165a7b9c5047d39f80273d1d81a111

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