Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29687161fc32c05…

MALICIOUS

PDF

37.2 KB Created: 2020-09-19 21:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e318d8637a6a4d65732777e006d6c6aa SHA-1: 8c7176504ad09fa1ec4475479b6c22fd00d05d80 SHA-256: e29687161fc32c05e35516c79ead0c8c2cf8746052182bb2b862e481b75f5544
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.cc/wix?keyword=i+vs+me+worksheet+with+answers+brainpop In PDF document text
    • http://bovar.bagribybagri.com/uploads/1/3/1/4/131454766/dc0b6.pdfIn PDF document text
    • http://nedov.bluelotushypno.com/uploads/1/3/2/6/132696147/9647872.pdfIn PDF document text
    • http://files.thebackpackleague.com/uploads/1/3/0/8/130814337/xidezitit-tevavitax-zubevoxojewa.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/1/0479/1615/5047/files/como_hacer_la__en_computadora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3698/4732/files/zewuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/national_awards_2019_winners_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/tutorial_google_classroom_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5772/files/alagappan_clinical_medicine_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4101/2374/files/66140687040.pdfIn PDF document text
    • https://b70a6096-5b43-4e03-9577-1fb275b339ee.filesusr.com/ugd/d1fcfc_f945b525143a45d58451e4d4f882b50c.pdf?index=trueIn PDF document text
    • https://f65487d9-8266-4114-ab63-b17547e5da72.filesusr.com/ugd/d31907_7e25fa0f9e7b4a37882beae139ca76d5.pdf?index=trueIn PDF document text
    • https://0551ba2c-54e4-4d06-a2ce-95ba1b810d3f.filesusr.com/ugd/66c878_a2d752867fcd4e5c851cc0b0bd35e293.pdf?index=trueIn 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_off00005292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5292 5320 bytes
SHA-256: 629ec3d007a1c853c2f3a6c77c678180482ea2cfdf1bff0e16cabf4286995aa9
font_01_sfnt_off0000648d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648D 10468 bytes
SHA-256: 9b38beadbe3bedc5d3c4afc0016d8bbc9454184b9ceaa756df08ff5e4f44649c

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