Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6b8c04acfbe976…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 17:56:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 00715743dbb66890c1daf4ff172ab104 SHA-1: bda673a8fddaeff2ef4ddd15b2dfa037749b6d2e SHA-256: ec6b8c04acfbe97605c4866326f82c7008ffb250559021b8f28c53b6feb3a9d3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=saved+and+discontent PDF link annotation
    • https://cdn.sqhk.co/kinemefuwa/fg6hgge/animal_cinema_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/ige5ghQ/the_culture_of_narcissism_chapter_summaries.pdfIn PDF document text
    • http://vash-komfort5.ru/surprised_by_hope_nt_wright_review35x1f.pdfIn PDF document text
    • https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/559465.pdfIn PDF document text
    • https://nivolepefusux.weebly.com/uploads/1/3/4/8/134886615/e84a3b0.pdfIn PDF document text
    • http://uscreditinquiry.info/4407908405179srt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fc9e86b4443e.pdfIn PDF document text
    • https://janusizexagelu.weebly.com/uploads/1/3/5/3/135337128/5279670.pdfIn PDF document text
    • http://cg-designer.xyz/nebokuxomu3oykx.pdfIn PDF document text
    • https://cdn.sqhk.co/mekoposa/gxHihie/44239143.pdfIn PDF document text
    • http://dsv-trening.ru/pokemon_ash_gray_rom_apk_download9ozri.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/firigugixujotov/87153812434.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/pasabizajo.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/anaesthesia_tutorial_of_the_week.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/nutrition_information_milky_way_mini_midnight.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_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 4968 bytes
SHA-256: ca67e2c75be291ae759b8d2317744aaa33f86fe1ffe25f40e2155e7bff8d71a3
font_01_sfnt_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 10688 bytes
SHA-256: bbae1417f195736b04d552ad00132c0437a41ebfc07d1a11c749947f75ded9f6