Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e5afa4c0f75285…

MALICIOUS

PDF

45.2 KB Created: 2020-08-07 14:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2170c8d56e388afb1730d9bbde730929 SHA-1: b3f73dd8c868777b1f6b0b6232f4d8361457f175 SHA-256: 90e5afa4c0f75285528fa2531d310619c0a73b87753e64605e408ab0ca3684db
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://ttraff.com/pify?keyword=spondylosis+adalah+pdf In PDF document text
    • http://files.ontcmc-comc.com/uploads/1/3/1/4/131406544/kamipan_ganab_zebafapifomad_lisojagugu.pdfIn PDF document text
    • http://files.olindacellars.com/uploads/1/3/2/7/132712306/mexizutet.pdfIn PDF document text
    • http://files.somethingforsam.com/uploads/1/3/2/8/132815004/fosabitajosom.pdfIn PDF document text
    • http://files.missgoob.com/uploads/1/3/0/7/130775435/tawujazitufareweka.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/1/0434/4859/8678/files/31304042321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/suvejimubijixal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/zudafosopofolefoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5858/5000/files/49347445586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/86586800416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/entrepreneurship_development_small_business_enterprises_charantimath_pearson_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5754/5365/files/tulixibimuwusiwoxafarolur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/asp_net_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/dizil.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_off000073d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 5240 bytes
SHA-256: dd9541e8e9ac367f44b6e6c3b8baf43fb8e11849779709bf9f8d220bbfebab1a
font_01_sfnt_off000085af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 10112 bytes
SHA-256: ff3e7655a394b9b21a629b18c29ff5820b39b00c6505c1e8656d3ec9050e2d28

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