Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e6f5dc84b29ceb…

MALICIOUS

PDF

43.0 KB Created: 2020-10-27 19:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7cde76d82663ef38683557902602225b SHA-1: 393e267472e5e3d792733d090ea52ddb57cd0a17 SHA-256: d7e6f5dc84b29cebb7466519d4c3792435ce9e2c59904e536d2897ba3332559e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to suspicious domains and are likely part of an SEO spam or phishing campaign. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, potentially for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=easeus+partition+master+key+2020 In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/efc6a3.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/295a4b086e.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/4ed4e3ad972a51e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5f905130b7100.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/7990608.pdfIn PDF document text
    • https://bitoxusimafitaj.weebly.com/uploads/1/3/4/3/134311342/werumuvup-robutewiwun-vafezuzumexel-rapetapudeju.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/5f8fa55b6.pdfIn PDF document text
    • https://beritugemob.weebly.com/uploads/1/3/4/3/134332724/wexibutodixok_wutiguka_vajubenorow_rodiviwa.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/vubuzabujiludamuv.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/9175970.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/7028853.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/kumefa.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/1/0435/8363/5619/files/chest_guidelines_anticoagulation_vte_prophylaxis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6616/2837/files/dosuribelujinegiruda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8394/6401/files/latex_label_table_as_figure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9513/9522/files/27515975567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8712/5910/files/nigesowamopidodokupamiron.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_off0000689f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689F 5328 bytes
SHA-256: c05e1d704b69ed70bfc663956a91c688e064473c52b95ccb2402f87ac5a0e103
font_01_sfnt_off00007aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 10676 bytes
SHA-256: cf76c5bf8c69f456ba87321618ca05af03f543a61ee97ce42ba6f6f1cf650311

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