Malicious PDF — malware analysis report

Static analysis result for SHA-256 536ab4d01453367c…

MALICIOUS

PDF

42.1 KB Created: 2020-10-12 08:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 16214ea138e0887ded48c9ef0d173f7b SHA-1: f4729e2bdeb0eeec174aabb1cb7ab0046a31b739 SHA-256: 536ab4d01453367c29b2a572640be892d313b594e14e895afe7c369b3db71430
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/pify?keyword=unaka+high+school+facebook In PDF document text
    • https://site-1043536.mozfiles.com/files/1043536/93700509314.pdfIn PDF document text
    • https://site-1038455.mozfiles.com/files/1038455/48888267369.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/84533204155.pdfIn PDF document text
    • https://site-1039271.mozfiles.com/files/1039271/tawixikevara.pdfIn PDF document text
    • https://site-1038861.mozfiles.com/files/1038861/52802594749.pdfIn PDF document text
    • http://zudugadu.shantystitchers.com/uploads/1/3/0/8/130814328/8782400.pdfIn PDF document text
    • http://files.roxandree.com/uploads/1/3/1/4/131437350/b8face87a52c7.pdfIn PDF document text
    • http://deroki.dennispearne.com/uploads/1/3/1/4/131438397/be520dba8b.pdfIn PDF document text
    • http://migaxa.pcbudgetsolutions.com/uploads/1/3/1/3/131381464/dumaginijolol_rifaziwala_laxifubumofefu.pdfIn PDF document text
    • http://teragobeg.themudlakeproject.ca/uploads/1/3/1/6/131636612/6315266.pdfIn PDF document text
    • http://xuxuwowi.christineomalley.com/uploads/1/3/0/8/130874276/4bcf4f706.pdfIn PDF document text
    • http://files.barbarabeckmanndesigns.com/uploads/1/3/1/4/131483492/1933529.pdfIn PDF document text
    • http://katorefu.federicoscholcover.com/uploads/1/3/1/1/131164110/9546503.pdfIn PDF document text
    • http://files.phenomenologyinvenice.com/uploads/1/3/1/4/131437046/acf258e.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/1/0433/6805/4940/files/89815881150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3981/6861/files/retojemor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/delezasifofifalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/louise_penny_books_in_order_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0488/9758/files/55322419929.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_off0000671a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671A 5240 bytes
SHA-256: d259d42408178680e27d20b6b712c09fa527fb7898d9c271332792e6ff138082
font_01_sfnt_off000078f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F1 10128 bytes
SHA-256: 92706423bf0ab5da00bff1beb279215560e3fd6104676ccede3d7915d3f54b09

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