Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d4d49b146eac604…

MALICIOUS

PDF

52.0 KB Created: 2020-10-28 20:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 52b372373669d8448559e6de787d9ac6 SHA-1: 4c5243f0249608ccfc0e98e1462e75f701ae212b SHA-256: 2d4d49b146eac604a264957e3929a14e448a7c38ef33157d6087f0132d601399
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=the+devil%2527s+pulpit+pdf In PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/57339ac2294ba4.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/5530131.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/darimerawus-jekizefivepasul-lumimivemage-kalekapaz.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/9821410.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/6896761.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/zipujenuzenul_wirujumofijar_posopuzit.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008dde.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008dde.bin)
    • https://s3.amazonaws.com/felasorarabipis/busavorog.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/kubarigosikib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/61156676871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/bomb_it_5_poki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4eb6f8-e8ff-4845-94b2-5f8c156c2729/31193715019.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/dozusarotowutixe.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/7143686071.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/alain_deneault_mediocrity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a155879-7657-40f4-8166-902c1374010a/jupon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/syntagme_et_paradigme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3347/9336/files/87450999719.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/mifel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6decea-5878-4936-b29b-c57aaa2a0b6f/53248022162.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/ielts_writing_task_2_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/pilesarezokesodikon.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/bugle_calls.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_off00008dde.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDE 4868 bytes
SHA-256: 51c196e1ab9f00517988dcae28f300c1e41bf2cfeb8d6db4e24df7ee61fe65b5
font_01_sfnt_off00009e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E80 10796 bytes
SHA-256: 16a5877e013aa2240cedf3be365d276644e739893d31860b5cbafc745d6ca837