Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9fa1dbc8c74ac9…

MALICIOUS

PDF

50.0 KB Created: 2020-09-30 21:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: de5febc273bfa3c2ff852c9430b4f563 SHA-1: ad038d9943e71c7d354c07ffdf3efc0b0416f5f5 SHA-256: fb9fa1dbc8c74ac9ae4c0cace2fcd9aaff5a03ac97202f708669e4c408715863
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'Porsche owners manual pdf'. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

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=porsche+owners+manual+pdf In PDF document text
    • http://files.juliamandalaweaver.com/uploads/1/3/1/3/131380138/5479598.pdfIn PDF document text
    • http://vapigupi.saintgregorysileby.org/uploads/1/3/1/3/131380934/kotebogisarisaf-folijoma-rojugizaj.pdfIn PDF document text
    • http://murojuzo.otakulifestyle.net/uploads/1/3/2/8/132814432/zeninuwokoxovovur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/lamowijizujoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/tozowawuzokuriwabadiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/gewijiletinor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52186a17-c1b4-474c-942a-f862e991fe6b/xukutunixuromezudusasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcbfbdf8-c362-4ea9-95b2-0929703bba7a/xifalivulufirewutobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300031cd-9fad-49d1-9264-3e4e9ab6a5cc/pameraguxuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8354/9857/files/vagotavixaxud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/mewatojadofoxesogodumugiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/osrs_myth_cape_xp_per_hour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0857/3091/files/23507214719.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_off0000777f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 5244 bytes
SHA-256: 85c641c58838bc9b592e8e455b44f53affb8751383f1cec762e1002ce2dd5a42
font_01_sfnt_off0000892b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892B 10504 bytes
SHA-256: b067ca18306da697fb92595384e5ff0f11adf2382007f121e780563d26d6a20e
font_02_sfnt_off0000ad1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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