Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3690e424d8696a…

MALICIOUS

PDF

45.2 KB Created: 2020-11-01 11:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 239a85420dad253c85b2ac241fdd1445 SHA-1: c31bb43437c20adc97566e0f30d74dc80f5388fa SHA-256: 0b3690e424d8696a4d2a9edc191a293b43f4f3f07fb1dd30354ee07fcf80ba8f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to link farms and redirector infrastructure, indicating a malicious intent to drive traffic to potentially harmful sites. The primary lure appears to be "unblocked games", suggesting a social engineering tactic to attract users. No scripts were extracted, but the extensive use of malicious links is sufficient evidence for this assessment.

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://ttraff.com/123?keyword=unblocked+games+66+basketball+games+5v5 In PDF document text
    • https://sipasegeremiraf.weebly.com/uploads/1/3/4/4/134404187/2d39ff99f2f31d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5f9585330da64.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/wopiso-xigas-zugozogejimeko-vugasepuj.pdfIn PDF document text
    • https://zelidewa.weebly.com/uploads/1/3/4/3/134371532/bozorapoletu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_5f987a6824c44.pdfIn PDF document text
    • https://tubomomumaxef.weebly.com/uploads/1/3/4/5/134508744/235140.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/578622.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/1/0428/7715/7542/files/actos_de_comercio_y_sociedades_mercantiles.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_off00006fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD2 5696 bytes
SHA-256: fb848915acc0469f3fcd8649b74c3b1ec85e8e9142932ceb1da9f88d1458ca7f
font_01_sfnt_off00008337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8337 10952 bytes
SHA-256: c2943ca038d7020ee7df774ddb4cb6f20fa721169445ed5e4cdcd2a7394a8dc4

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