Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e55227512444f32…

MALICIOUS

PDF

45.3 KB Created: 2020-10-18 18:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2ee95918781e7d503f8083e23e490574 SHA-1: 290da60f5bfb1ed8cb4dddbaabcb0da4a6150c67 SHA-256: 7e55227512444f32ecf301a617f4bdc35b498cd7d67b466ce49e4062ceba8cf6
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/123?keyword=current+affairs+in+kannada+2020+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f89d419f2fed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f8be630536aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f87633996394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f887301e5c98.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/vegijotu.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/segisofapefu.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/6384478.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/99701cb6-aa86-4fc7-822a-6015d2ee4078/98838191081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bd682e-168c-4925-8b79-f143d8e9ac35/28442769463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba844ea-681f-42b5-9a0d-6d23b9dbd1db/44439723348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/libra_man_sextrology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9262/9917/files/parrot_eggs_for_sale_in_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9432/0304/files/77329937628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1532/files/zelazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/75152883198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7406/3010/files/65065074511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1197/5586/files/harry_potter_excerpt_book_5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A80 5372 bytes
SHA-256: a8fff38d0232063d19684a85bdb219ec685f72c63cd49c925da3e10fab6e84f9
font_01_sfnt_off00006ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE7 14484 bytes
SHA-256: 1114cf3efcee23946f652dc4cce53e1ac5c186f67901ee810fc9198a7ddcef0a
font_02_sfnt_off000099e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99E0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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