Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9fdd80c6bd16c1…

MALICIOUS

PDF

64.5 KB Created: 2020-12-05 13:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: adbf022bad47d57996ee56e8e269dbe0 SHA-1: 95d55db38707c03ac9d821b96b605213f5a0f7ff SHA-256: 0b9fdd80c6bd16c1541085f7e7ce9463830535212bcb703703b80ae345b0b4d0
194 Risk Score

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.
  • 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/wb?keyword=domain%20of%20square%20root%20function%20worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_5fc11fde4a171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5fca6ef220789.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/1be5d38d-1186-431f-9e72-b4cfb635c822/86712445627.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe17f9f8cdb769c6ab696c/1606293497798/la_paz_weather_in_december.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3aad26ff1194f72fc70/t/5fc26b054f983757202de174/1606576905315/safety_1st_guide_65_sport.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/gojusominutux.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/xasubewijidonikagelawug.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/bonds_mens_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/aha_guidelines_ischemic_stroke_2015.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf0369b1ed035389f7288/1606283318887/plantronics_voyager_pro_hd_wireless_bluetooth_headset_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c2e10f-fe88-435e-983b-4121a6c3d3b2/14231453816.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/autodesk_inventor_2019_basics_tutorial.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f33f2cf09257bd6c4f7e/t/5fc2d5993c02f22b9d6ad7b5/1606604186521/duck_life_unblocked_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/operational_test_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/tenants_reference_letter_template.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_off0000be5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5E 5372 bytes
SHA-256: 288a2efa0454a9e38bc5a3ee15e1337f03f7f864c573b921734ef33c1e700773
font_01_sfnt_off0000d095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD095 10748 bytes
SHA-256: 99e4aa62d80ec455f3c15583104386e2ffb9dc6969cc3d283ed671e10b944c40

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