Malicious PDF — malware analysis report

Static analysis result for SHA-256 da372289964902e6…

MALICIOUS

PDF

40.8 KB Created: 2020-10-25 03:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 1f378671c7390ef05657533299958830 SHA-1: e24f98779340a35280f269630c42dccd5e4e73e7 SHA-256: da372289964902e60d7c0d225a98a12ee3f326b21852de9458410db67d0eef92
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://cctraff.ru/aws?keyword=consecuencias+de+bullying+pdf In PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/mawafukutopopomu.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/6205182.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/7483920.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/384333.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/6426396.pdfIn PDF document text
    • https://jawokipuroz.weebly.com/uploads/1/3/4/2/134265350/6606296.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/gonazisan.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/8966746.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006275.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006275.bin)
    • https://cdn.shopify.com/s/files/1/0483/0275/1905/files/how_to_reorder_pages_in_word_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/what_is_the_purpose_of_a_confirmation_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9661/9193/files/55414783705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/homestead_act_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6530/8849/files/rivetojivamolobefaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/mopofegadotobakidevok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2484/2391/files/jesed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9985/9360/files/m_card_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/wikabasokim.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/ischemic_heart_disease_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/8947184583.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/basic_house_rental_agreement.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 extracted file (font_00_sfnt_off00006275.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6275 5372 bytes
SHA-256: 954320b7c4675675d975fae40e13f488cb2a43195d5ed3380f200279271dc40a
font_01_sfnt_off000074d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 9888 bytes
SHA-256: 7576659f70afa8b4b20dafcd64b76dd5c1b8752947f664ec33919dedbd6b1cea

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