Malicious PDF — malware analysis report

Static analysis result for SHA-256 61433e058d65bc0d…

MALICIOUS

PDF

54.5 KB Created: 2020-10-11 09:34:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fdb33df396cb1a21d4b854468f6e1484 SHA-1: 56dea90a7c1dde31caf720ed91543599d775ebe5 SHA-256: 61433e058d65bc0da6d7cda0edb6dd51e9f50f9cead5bb7f24c15fcb17a91654
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text suggesting a lure related to 'Pokemon malasada guide' and includes the malicious URL. The presence of numerous external PDF links, many with numeric slugs, indicates a link farm designed to distribute malicious content or engage in SEO manipulation for phishing.

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=pokemon+malasada+guide In PDF document text
    • http://dawirol.nptha.com/uploads/1/3/2/6/132695478/vadujoputagaxibif.pdfIn PDF document text
    • http://files.hudsonclassical.com/uploads/1/3/1/4/131437385/bomuz.pdfIn PDF document text
    • http://files.stitchesbylynsey.com/uploads/1/3/1/3/131381706/zadezima.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://uploads.strikinglycdn.com/files/5b24f5a8-30d6-4aa8-8c73-5c9a31d7915b/tuloper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca35b13f-ae2a-4666-9075-8babc54d605c/44388632374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a30bcb2-e83e-4471-8a08-d9f7150a7222/jitafukowilar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae455cca-59e1-4589-8157-bca574148406/laxotofarutarizumesul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f344e63-3e5c-458b-87f8-c2349e2344f6/26005929046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7398/9529/files/77502523975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4295/4651/files/megolebuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7100/7639/files/jepofeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8150/5437/files/credit_recovery_geometry_benchmark_d_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7160/5410/files/ge_portable_ac_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3546/7162/files/gotole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6887/7721/files/gedivarawotupari.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 11848 bytes
SHA-256: 4ae192615b2498b1169c9b86203b9a06c07b018309eb054dba77f1eb0f386a31
font_01_sfnt_off0000896d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x896D 4916 bytes
SHA-256: 727949aa7de85692dde4c4ebfc402e7b493fc7eb78f131cb2d37aaf961b23274
font_02_sfnt_off00009a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A04 11808 bytes
SHA-256: 47215e05da4543fcdc007b6f2d4edc902453dc43233766876dfc496f9c7c5ca3
font_03_sfnt_off0000bec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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