Malicious PDF — malware analysis report

Static analysis result for SHA-256 742ed85889f8bf9e…

MALICIOUS

PDF

48.6 KB Created: 2020-10-15 13:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d7527e5cacbe81d9c5e1a67d08a1286b SHA-1: eea15d22204b6abd1f1fef776ae0f39d7b4bbda7 SHA-256: 742ed85889f8bf9e8dd076265bcae78e832aac7b087435c1052951369847bd4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern observed is the use of a link farm to direct users to potentially harmful content, masquerading as a document about 'Kubla Khan'.

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/pify?keyword=kubla+khan+as+a+supernatural+poem+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f881dbcd0e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f88094874d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f87421f8b532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f87e1c2621ed.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/dalamazerozana_buwalukozoj_nuluxozudowabal.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/8441923.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/7099023.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/3809296.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/zojefokaduve.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/bifekapum.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/a6d49381-686b-49a3-9fc0-7eb7972bb8ce/49480494747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3957/5192/files/time_warner_cable_box_says_alt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7142/2631/files/daletupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6855/1068/files/patelazofobitit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9377/7302/files/29273795982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0200/3108/files/viriradolitavexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9016/8987/files/types_of_dna_mutations_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/practice_makes_perfect_french_books.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_off00007190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 5288 bytes
SHA-256: ca478011b9dfa4b252a9f7c14941b297fa2963cd17a61f35934c3488c758a249
font_01_sfnt_off00008346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8346 10312 bytes
SHA-256: 62b4b37fc4293ed0497642e7842e4165142582764a2ddb153827250570a776ee
font_02_sfnt_off0000a680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA680 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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