Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c7b2833002c14c…

MALICIOUS

PDF

40.5 KB Created: 2020-11-04 15:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1b0644b8a0b24493d1ac1591749177a2 SHA-1: df45d530f7fceca37f8b894c6a29d3c506e1eefa SHA-256: 52c7b2833002c14c7f98d36350fe01b14bd7ee0c7015a90c00484307b3df6f1a
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://gettraff.ru/aws?keyword=washing+machine+repair+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f88fd503017f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_5f9b7f03e03dd.pdfIn PDF document text
    • https://patelevenimo.weebly.com/uploads/1/3/1/4/131437444/6600652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f95f3b48dffe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5f8c99f45db46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_5fa03bcab3bf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_5f9c480421a67.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/4328668.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/jelibewadowefeganu.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/1/0506/3301/5472/files/advanced_rocketry_guide_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7239/5672/files/nudukunavazagolepiv.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_off00006017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6017 5360 bytes
SHA-256: 761a565ca9159a239841aa4f04b8ceadb47d45a2aba794d793238922a7742bfa
font_01_sfnt_off00007239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7239 10332 bytes
SHA-256: d92fc61484c25cf89cca90c6fd178e70eded41ee2dc553b3a3e374587319a809