Malicious PDF — malware analysis report

Static analysis result for SHA-256 64137b206c4ec446…

MALICIOUS

PDF

45.9 KB Created: 2020-10-02 08:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fc65f15244da059913e44d6ee57cb4ad SHA-1: 58c3e3159e19c508246f95127751276c7837cc16 SHA-256: 64137b206c4ec44677e2597ef9407b3b677d62a3ba291d0d84047ab858953432
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'samsung gear manager apk iphone'. The presence of many external PDF links indicates an attempt to generate traffic or SEO manipulation, likely to obscure the primary malicious URL.

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=samsung+gear+manager+apk+iphone In PDF document text
    • http://files.monicassweetcakes.com/uploads/1/3/1/4/131409275/2512892.pdfIn PDF document text
    • http://losipuxig.rsllcw.com/uploads/1/3/2/6/132682883/luriwizogage.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/1/0428/5123/8047/files/cafeteria_nipponica_apk_full_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/29447177026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6646/1853/files/chest_physical_therapy_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/64394932952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8889/8973/files/62702251496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/22_clues_level_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4152/0278/files/nursing_outcomes_for_pneumonia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/musiniwaditenule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9c0645-8932-4676-8094-c0c298be3c2e/42171254294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a608ec97-7b27-4e37-8e6e-d7e6b393bb25/navaxiguwinibodurul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f4be63-d6ae-4c94-b35f-f5b662dac1ec/47161092218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65a277f-e54e-44ff-83aa-4e7a50116d9f/66211262637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e07844-f2f8-4ca6-8713-18b196fbbe2a/63929623176.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6E 2880 bytes
SHA-256: 67a235ca91014ef9abad17b0ce061d8cb1824a118994b61af149de549f24eeab
font_01_sfnt_off0000749f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749F 5368 bytes
SHA-256: eeeda48744b1db32c1d5baaa762c3e5dcc993a9116c9dc1a312af4b7ce785017
font_02_sfnt_off000086b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B5 10280 bytes
SHA-256: 3b1594fc44efd3da5f518520c2f427cda35623cc2c75bc987002e68efd978ea7

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