Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb2e5549288d509…

MALICIOUS

PDF

78.8 KB Created: 2021-04-01 23:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fc304def9b51bb6d5ee0b27e1f4a283b SHA-1: 5ba13bbb8b3edb7f8dca79ab97c823c21a7d730d SHA-256: 3fb2e5549288d509c969fde1c4c8fdbc2b58c6b0d88310db4d7202275ae49a02
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wix?keyword=shahada+queer+eye PDF link annotation
    • http://buwovavozu.getenjoyment.net/sennheiser_rs-175_wireless_headphones_and_receiver.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/ea5ce836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_6049eb01e7153.pdfIn PDF document text
    • http://duwosolutanuz.mypressonline.com/23654853982.pdfIn PDF document text
    • http://katerevemoposab.iblogger.org/63282805628.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369771/normal_60034207d5b44.pdfIn PDF document text
    • https://cdn.sqhk.co/mezomabesoki/gidDIjd/27897451579.pdfIn PDF document text
    • https://wixepivod.weebly.com/uploads/1/3/0/7/130775856/savomadalito_risixib_pumifuti.pdfIn PDF document text
    • http://livemavuxedu.getenjoyment.net/41960046594.pdfIn PDF document text
    • https://cdn.sqhk.co/ratosakip/fhb5hbz/wood_carving_tools_for_sale_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/wiiiduD/easy_chocolate_ice_cream_recipe_without_condensed_milk.pdfIn PDF document text
    • http://ninudogexefeg.22web.org/asana_rebel_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xadeviro/bhajdtW/stickman_archer_hack_mod_apk.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/bd9b5c12-52cc-4f46-93da-9c4b2f8f5409/spri_resistance_tube_exercise_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524cbf75-bb74-4df0-bada-de4bdecf3090/24805957613.pdfIn PDF document text
    • http://pijularof.epizy.com/glossary_of_computer_science_terms.pdfIn PDF document text
    • http://roveramo.atwebpages.com/100_deadly_skills_download.pdfIn PDF document text
    • http://judedinem.epizy.com/humus_liquido_de_lombriz_roja_californiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa90a006-c3e8-490b-88aa-26e7a5b6aa07/what_are_the_12_stages_of_a_heros_journey.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_off0000f5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B3 5036 bytes
SHA-256: 8000f9e0cea0a6d8ff503e67f0f36de4483fa7dfa7b6212e66345cc56096a156
font_01_sfnt_off000106d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D2 11024 bytes
SHA-256: 52f988f77e9c18cf23075d0696e08329a07b67969881f0a84d5278729b243b8b

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