Malicious PDF — malware analysis report

Static analysis result for SHA-256 896b1bf7def06e97…

MALICIOUS

PDF

41.3 KB Created: 2020-10-15 18:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8f5a9f2384ad92f45d5120d96b0f680e SHA-1: e3ce07f2b78ab8a951e443d6582a0514db9ce66e SHA-256: 896b1bf7def06e977640c99209e2f4446efb06cedf5be65d1f37bdcfea0589e2
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://ggtraff.ru/123?keyword=manual+handling+techniques+for+lifting In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f87e8c20f7b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f879b2f82df3.pdfIn PDF document text
    • https://site-1044017.mozfiles.com/files/1044017/zaguzimamopikovoxu.pdfIn PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/77502148341.pdfIn PDF document text
    • https://site-1043366.mozfiles.com/files/1043366/52671640033.pdfIn PDF document text
    • https://site-1039785.mozfiles.com/files/1039785/burigusixa.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/tutigimuxewovif.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.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/1/0501/0056/8221/files/2668281653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7698/6034/files/converse_return_policy_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/doors_and_rooms_2_3-3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6445/1221/files/colonization_through_the_constitution_vocabulary_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/st_thomas_nursery_school_terrace_park.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/wafibumizidezuz.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_off0000625c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 5416 bytes
SHA-256: e3a859afd95f30c3bfd9026ce17f00ec343c80aef023ea82139486b444c839b1
font_01_sfnt_off000074b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 10400 bytes
SHA-256: 72683f044154d3ad8b4f3de63b66eb97358502cf9ed5dccb5713fadeabcdadc6

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