Malicious PDF — malware analysis report

Static analysis result for SHA-256 547e49fb92eb66ff…

MALICIOUS

PDF

47.5 KB Created: 2020-09-30 23:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f042a8e9961677fb3152fae4d695fc82 SHA-1: 2e6ba826cc3550b9549e45a99fd83f0abb9a6e39 SHA-256: 547e49fb92eb66ffde476f6781b19ef2bc9bea0b6b83a9f3ca74b9b35af73f7d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://gettraff.ru/strik?keyword=politeness+strategy+journal+pdf In PDF document text
    • http://files.conteanalytics.com/uploads/1/3/1/3/131382395/7d07e14bc6dcf9.pdfIn PDF document text
    • http://files.captainrice.com/uploads/1/3/0/7/130775180/gokakon_wazeb_lewefusel_tupur.pdfIn PDF document text
    • http://beperadog.lavrak.org/uploads/1/3/2/6/132681513/7765988.pdfIn PDF document text
    • http://files.michellesjohnson.com/uploads/1/3/1/4/131406684/fukomuwula.pdfIn PDF document text
    • http://files.andylivingstone.com/uploads/1/3/1/6/131606674/a290ae1e7a510e8.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/68507963314.pdfIn PDF document text
    • https://site-1038312.mozfiles.com/files/1038312/penofajurijuxamut.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/jutujibape.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/jesagebugasete.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://uploads.strikinglycdn.com/files/c57784fb-c6a8-48b5-96e8-af8106ea8f22/vikipopoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed695ec-72c3-4362-b3c7-b164509274ba/ruxijupanup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/11125387931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3978/0775/files/frases_de_dios_para_jovenes_bonitas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/nonverbal_communication_crossword_puzzle_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/77827760146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9862/0323/files/zamedoperire.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6A 5268 bytes
SHA-256: c02482085d07d8be7d2a11363f22730fd43c9afd06292acd79f0573cfc76ffe5
font_01_sfnt_off0000806b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806B 10068 bytes
SHA-256: f02fba371c64a39d1fda715da8ed68a6bd5046ba8e3045a4c595726b96323c1e
font_02_sfnt_off0000a2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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