Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba0074fb6013d83…

MALICIOUS

PDF

46.0 KB Created: 2020-11-01 19:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eb27467bb58a3a56919f82f53cf23b22 SHA-1: c88be10b8263246c4f06fb320f60eb28ede974e9 SHA-256: 7ba0074fb6013d834c7f54a62b09cd1c87d63ec14b0f35f4fce3151e9289e9e2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body and embedded links suggest a lure related to 'unblocked games' and 'cheats', which is a common tactic to drive traffic to malicious sites. The ML classifier also strongly indicated 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://ggtraff.ru/strik?keyword=soenix+unblocked+games+uno In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e80bd5-c1d4-40ea-b082-f0b3568bef79/how_to_get_unlimited_money_in_csgo.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/51087853786.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/33320441148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7b49ad-bc1b-433b-8b5e-b693329342f1/nopedavowes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ecf1f99-84c4-4d6c-8aab-0294e25039a1/mariage_traditionnel_betsimisaraka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9353/1555/files/taller_numeros_romanos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3496a85-29e9-4c01-945e-d5577391d0e4/hurdy_gurdy_man_lyrics_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4abecc16-0784-4d34-b620-006b43effa38/69686862049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f19196e-d27a-43ac-a4ad-8f20ffce3572/97450614437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62583aa2-c496-4b31-b585-3f27c2ffe65b/zuferaruso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/12108471193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43930013-297e-499e-ae70-5379dafc640a/54076399023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3096ea6c-5e6e-4ae4-989b-9e5257cd98e2/tiluvuteneguzidaruvobina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65813abf-575f-4d3e-9375-5bb086d6a5e6/nomegidopovigo.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_off00007214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7214 5540 bytes
SHA-256: b164d7b8859b2dc5b020911c9ad00a2fd24b16ac123f1627e38169de9e2241b1
font_01_sfnt_off000084e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E1 10900 bytes
SHA-256: 51328ba14b098c48da2892ab98ad67ac0755074ec3e3b708cc24b7d457b78917

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