Malicious PDF — malware analysis report

Static analysis result for SHA-256 3716289f5913d242…

MALICIOUS

PDF

74.4 KB Created: 2021-02-22 10:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d63b5f53b2d06fbf5a31c2f31d756bfc SHA-1: 6331f1441bf22c5d3069f2ed8dc855d6525ade3b SHA-256: 3716289f5913d2422058c0a8e441e5672940b085c134104d3031fb98396349fe
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=how+to+use+hose+end+weed+sprayer PDF link annotation
    • http://bigno.space/how_a_realist_hero_rebuilt_the_kingdom_rawkodze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5ff65eb83f8b3.pdfIn PDF document text
    • http://creamwalls.space/south_film_linkbnk9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5fd61e9a1d8f9.pdfIn PDF document text
    • http://ufenmac.com/activate_b2_student_s_book4ek2z.pdfIn PDF document text
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/fugituvujumi_wunivejodofov_xonimos.pdfIn PDF document text
    • https://bezujopejot.weebly.com/uploads/1/3/1/6/131606295/vetaxomu.pdfIn PDF document text
    • https://lalemudisezevo.weebly.com/uploads/1/3/4/3/134359520/vowozekin-metexem-madevareg.pdfIn PDF document text
    • https://povazolanatul.weebly.com/uploads/1/3/0/7/130740072/filubefeminegatakiwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_600d7faba32d6.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/jeworurowam/27244886493.pdfIn PDF document text
    • http://jidufapikefufeb.epizy.com/petsafe_dog_training_collar_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/acdsee_software_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/google_analytics_reporting_api_nodejs.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/glencoe_mcgraw_hill_math_answer_key.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_off0000e660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE660 5172 bytes
SHA-256: 4207514c6e7a8cecd477c53ff8bf6ffb015449738fc1235e0b0255ad7ebbd569
font_01_sfnt_off0000f801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF801 10836 bytes
SHA-256: 1612bbed47c12faca3b5bcea67d126db3ac91938bc67648876eb328fbebc548f