Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afc57bdc77f5e9d…

MALICIOUS

PDF

40.0 KB Created: 2020-10-03 12:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3b193579a22223f46679e8299b01d01c SHA-1: e5a4c29f34c680e202ce353a21452fd47702530c SHA-256: 0afc57bdc77f5e9db3cc01f23a333f2ec3debdc1ddde07e14677d5fefccfaf53
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or malicious content distribution attempt. The embedded document body text and heuristics confirm the presence of links designed to lead users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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://cctraff.ru/strik?keyword=convert+xmind+file+to+pdf+online+free In PDF document text
    • http://files.vineyardfamilytennis.org/uploads/1/3/2/6/132682555/xijojurozo.pdfIn PDF document text
    • http://files.joannarosepaintings.com/uploads/1/3/1/3/131383330/dotefedinekotovez.pdfIn PDF document text
    • http://files.thirdstreetchurchofchrist.org/uploads/1/3/0/9/130969772/soraxanaxawovebem.pdfIn PDF document text
    • http://files.drfrenchyoils.com/uploads/1/3/1/3/131384654/130bbb9d1.pdfIn PDF document text
    • http://vitob.paloverdeafjrotc.org/uploads/1/3/1/3/131380344/jepenajukokalima.pdfIn PDF document text
    • http://porem.nationalparks-list.com/uploads/1/3/2/6/132682646/bowavekurefegoxuvi.pdfIn PDF document text
    • http://gukekodif.falithihealing.com/uploads/1/3/0/7/130775200/9394400.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/1/0427/7056/3239/files/me_n_eds_sanger_ca_bethel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/lozekedodojidoxotalesat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/xijalirixumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4979/7790/files/kepuwozugikiratefofemaxut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/87326886628.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_off00005f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F86 4832 bytes
SHA-256: 0aaf113d7cdcc872c157d96a5a980309b19caafbca62845d02eaf4789063244e
font_01_sfnt_off00006fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 10404 bytes
SHA-256: 64155ff30954820d9c9b1e0c23972bd08d68d181dc6289cca0f1cf5c68328c66

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