Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2d20f53b3656e4…

MALICIOUS

PDF

45.3 KB Created: 2020-10-04 13:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2c042d2dbcc3a90911541fcd332e65e9 SHA-1: ef44d892bb41517d777611e0f6e82492718f2ddc SHA-256: 7e2d20f53b3656e48ac4af9ab3cc13ea0883b2c8b2e99e6b112188d8fe02be05
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a known malicious redirector, disguised with text suggesting it is a game guide. The document body, though heavily obfuscated, contains the URL and other links that appear to be part of a link farm designed to improve search engine ranking for malicious content. The ML classifier strongly indicates maliciousness.

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=pes+2020+scout+guide In PDF document text
    • http://nirok.christinaherman.com/uploads/1/3/1/6/131606069/e20ec3b1b8.pdfIn PDF document text
    • http://zewof.surfandsoundevents.com/uploads/1/3/1/4/131407089/436566.pdfIn PDF document text
    • http://gudux.emilyfuchs.ca/uploads/1/3/0/9/130969744/690cf93ecfc5d.pdfIn PDF document text
    • https://site-1040576.mozfiles.com/files/1040576/tebopetolepimunojekapi.pdfIn PDF document text
    • https://site-1038338.mozfiles.com/files/1038338/mujuvukubefobanufilu.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/15272650051.pdfIn PDF document text
    • https://site-1036800.mozfiles.com/files/1036800/83332260121.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/23457661326.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/1/0434/8326/7236/files/dupli_color_scratch_fix_all_in_1_white.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/periapt_of_proof_against_poison_3.5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0976/4259/files/86416748212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1832/4632/files/79123329069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8175/1456/files/94395096214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/mpc_one_hard_drive.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_off000065b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 4820 bytes
SHA-256: 39f6bb1863ff3a008c995b95de4867908480b9213aeb9b9c161d330cba1d504c
font_01_sfnt_off0000762c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762C 10632 bytes
SHA-256: 64103f75468b8310d72f30486f9e824a7e1bc54590448fc5a72b6a409871f8eb
font_02_sfnt_off00009a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A57 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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