Malicious PDF — malware analysis report

Static analysis result for SHA-256 238302e6de365392…

MALICIOUS

PDF

40.0 KB Created: 2020-10-28 06:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d4277cdea6c640b619cc7428c0f91baa SHA-1: fbd9b1d3ee89eb3275ddbd01f9cff40b7fca4ac6 SHA-256: 238302e6de365392b735f344203984b8990284599592844c0a02f8705ff37afd
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate a link farm designed to direct users to potentially harmful infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector finding.

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://ggtraff.ru/123?keyword=exploded+view+inventor+dwg In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_5f909e11e29ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391335/normal_5f98a255b4fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5f8c14ef428b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f872b3027ef6.pdfIn PDF document text
    • https://vujerige.weebly.com/uploads/1/3/4/4/134467486/xameju_jidagabokujiv.pdfIn PDF document text
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/pavuwutuwepageges.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/a185f85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f89a83a3551e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5f8d813126c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f888f1e40c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5f8e6c35a6f71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f912961f0385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_5f8ee9a3b2ad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393628/normal_5f9171722ab48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_5f938691e088c.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/1/0503/1611/6126/files/makezomadesixokasataduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1456/9115/files/anahuac_isd_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/adaptive_signal_processing_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1546/5883/files/36211580965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2575/9893/files/baby_essentials_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5478/7477/files/jackery_portable_charger_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9245/1232/files/n64_rgb_mod_borti.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_off00005f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 4916 bytes
SHA-256: bd4498886a22fb2096a04b5e9d61abc8926dc3192b379fc1224120cc6916b5b7
font_01_sfnt_off00007000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 10236 bytes
SHA-256: 7feddb1a0ee668dec02b660d8b0bedc2bb6dce8455fca2b7fd1134c3b74371a4

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