Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd6b42c5ea3f90b…

MALICIOUS

PDF

88.8 KB Created: 2020-11-21 20:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7a59f4f262a7db5e87cb059d0ec58074 SHA-1: eebfb996e97efd8250e227955d0bd2fcff4d2e3b SHA-256: 1fd6b42c5ea3f90b8cb2629f9232adf264a1656c33d3740e469e92a2f9e1139f
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary purpose is to direct users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/aws?utm_term=grade+8+english+curriculum+guide+pdf In PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/kexivugiribi_sodameloxin_karotojid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494138/normal_5fad7c83695cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5f8afd8662d96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531523/normal_5fb62c51e88a4.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/durexazedu-sowufikagefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f870e0b44204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_5fb2d2eb8ce5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f88c2c505e50.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1407bcd9-c1de-40d0-9748-059b838f811a/dedipibemakimufizamunom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57f6a4f-fcc3-4050-9e16-8f18ae6cb13c/32753945830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8805df7-95a1-46e2-9533-c95c84b670c4/92954858077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9298bca6-4dc7-4c03-9b2a-0cc42c4c85a2/xuxipulonofam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c330686-8663-4d56-bfaa-35f8a824f8ce/62361431387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1658996-e4be-4ea4-a50a-c58660205f29/rupab.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/ajax_call_content_type.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_off000106b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 1872 bytes
SHA-256: cf373f8eb364677dc8d29ae0cbe658a1b8665e9067f0cd69b3a2e84d4b370a53
font_01_sfnt_off00010fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA7 5484 bytes
SHA-256: 2c8dc0e7365cf340d1f1c88492c4fd9eafd12424577b806906d9de3d4e0a4123
font_02_sfnt_off0001221f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221F 10848 bytes
SHA-256: a855e758492e38aaecbb7296c7831457882d50a41c7be0a79f1217dc191ea125
font_03_sfnt_off000146fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146FD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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