Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f522cff9b87f8c…

MALICIOUS

PDF

38.0 KB Created: 2020-11-01 08:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0c433a3fe6c670aeda26efe7b09d582a SHA-1: 20e08e57ed0a27795fd1bcb9653d887e66244036 SHA-256: 86f522cff9b87f8c2764686c9ea9f6a224f2c435b47603de0a0ffaea7b9ec212
94 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though obfuscated, contains a URL that appears to be a lure for a 'portable work bench lowes' search. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is likely spearphishing attachment, leading the user to click on a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.me/pify?keyword=portable+work+bench+lowes In PDF document text
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/gizoxasigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_5f8fecb9e478f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f8c8d387dcaa.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/592a9ee0c4e6e.pdfIn PDF document text
    • https://vuwejugo.weebly.com/uploads/1/3/4/3/134309576/1899945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f976cb9b2807.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/nifit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410965/normal_5f9e137204b77.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/1/0431/7777/1164/files/airmans_information_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/50251824139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9768/3605/files/apk_mcpe_master_versi_terbaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4095/1448/files/39611518737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7866/2326/files/soxivipitidej.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_off00004a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A02 4924 bytes
SHA-256: af3dac37f4cc9c7c2138bfec70837ebe956c0932b6c330439b04a78e783ad472
font_01_sfnt_off00005abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABC 9940 bytes
SHA-256: c80872d51a0620ebc617237dc6da6e7e62cc51029b64e45b9cc36209d971ea3a
font_02_sfnt_off00007cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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