Malicious PDF — malware analysis report

Static analysis result for SHA-256 7beccf90c46f2c78…

MALICIOUS

PDF

51.3 KB Created: 2020-10-28 12:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f39ec442e251bf5749f924ba7529a9ec SHA-1: 55f275ea581660d8c451a302b34995b525ebc8f3 SHA-256: 7beccf90c46f2c7850548bf51ba6ce3a0cd0b38be09c7f00719c6973d7d8f28c
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://ggtraff.ru/pify?keyword=tablas+de+multiplicar+del+1+al+12+pdf In PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/ec1f0f3c347fa.pdfIn PDF document text
    • https://mesumubanok.weebly.com/uploads/1/3/4/5/134507600/8274700.pdfIn PDF document text
    • https://gasogufimuti.weebly.com/uploads/1/3/4/4/134461051/sonipemowotumoba.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384828/normal_5f96742234f7d.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/zikoviwodedupili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8f912f5cfb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405208/normal_5f95b6bf5d420.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2022/1596/files/47817674068.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/tartarin_de_tarascon_en_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/o_bergsonismo.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/732442580.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/23089377913.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/lovol.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/16823905132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/cognitive_speech_therapy_goals_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/android_studio_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/adobe_acrobat_word_to_converter_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8581/4173/files/independent_dependent_and_controlled_variables_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/mowipilamisakedopebeg.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/jofalaxivujowas.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/24116364056.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_off0000849f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x849F 5576 bytes
SHA-256: 8441d92c98efce314b310a67a3eacd5a1d92d32fedae6d21a5f553730417fcc6
font_01_sfnt_off0000977c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977C 11952 bytes
SHA-256: fdfe6b08d6f63014077ef22c1440f8bc9347497e8ae8ed62293a820afb7275f1