Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e85757f4082a5e…

MALICIOUS

PDF

45.3 KB Created: 2020-10-02 05:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: cc27c8e85b937938636c52432d71c784 SHA-1: e892a0906499a54ffa29dd7389b06d67b8df6bd9 SHA-256: 83e85757f4082a5e65cd67d62a27427781707f70864f1e615416a855be5650db
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=les+thatcher+guitarist In PDF document text
    • https://site-1038510.mozfiles.com/files/1038510/nuxojovum.pdfIn PDF document text
    • https://site-1039676.mozfiles.com/files/1039676/vemilupuninixukudumaj.pdfIn PDF document text
    • https://site-1036868.mozfiles.com/files/1036868/67686965732.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/33336780560.pdfIn PDF document text
    • https://site-1038572.mozfiles.com/files/1038572/daxukujitesise.pdfIn PDF document text
    • http://vunopajep.abbiechesneylpc.com/uploads/1/3/0/8/130814030/rutivewoguzuruf_bawosezevopa_mevobirapit_sozifalezopu.pdfIn PDF document text
    • http://files.memorial-videos.com/uploads/1/3/1/4/131437873/pizos.pdfIn PDF document text
    • http://rabaki.sciencefarts.com/uploads/1/3/0/8/130874496/mudodajo.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/sedefanagatakejud.pdfIn PDF document text
    • https://site-1037114.mozfiles.com/files/1037114/42280107267.pdfIn PDF document text
    • https://site-1039950.mozfiles.com/files/1039950/32020374007.pdfIn PDF document text
    • https://site-1039789.mozfiles.com/files/1039789/24210158566.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/1/0436/6965/1609/files/population_dynamics_lab_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8150/5437/files/fefewujigapowamizadulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3349/3409/files/bill_nye_science_guy_gravity_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/forumire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5942/4665/files/37640193290.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

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_off000071b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B1 4972 bytes
SHA-256: 2e466b87c44e3a970b883f7ba045fc3eb46c96e4b4dac38d8fe1336c8782d97c
font_01_sfnt_off00008294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8294 10812 bytes
SHA-256: 082286ce608d16ff0f15c9344bd1085c69b5ab55ef21723b35a6ead226ee27f5

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