Malicious PDF — malware analysis report

Static analysis result for SHA-256 547bc662f04683dc…

MALICIOUS

PDF

49.4 KB Created: 2020-11-06 02:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c769d5e1f9c2124033afb0b138de00df SHA-1: 6675cf98cc62ee8d528a7d7b1f66d0c1e3652f91 SHA-256: 547bc662f04683dcc74656e5624b431189700fa12dc7eaaa7159f7129c1bf25e
102 Risk Score

Malware Insights

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

The PDF contains a link that is flagged as a malicious redirector. The presence of a 'download button' heuristic suggests a social engineering lure to trick the user into clicking the malicious link. The ML classifier also strongly indicates maliciousness. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?keyword=first+quarter+moon+define In PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/a064651c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f913a804e187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f9018555ecc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8f87996ff49.pdfIn PDF document text
    • https://titobuvidotid.weebly.com/uploads/1/3/4/5/134598786/sapemujipunoxad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mamibis/balloons_over_broadway_book_read_aloud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eafc286-692d-48fd-909b-3bf341f20de2/petadokemitebaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab08f6a-e10d-4105-89b0-806ac69b59c0/assessment_guide_houghton_mifflin_grade_5_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/65348110442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5913/3602/files/average_income_in_colorado_by_city.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/77304811483.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/vumewavelemoxikaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce66869-4bca-4c3c-9e47-03d93cf00575/96856070659.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_off00007ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBE 5100 bytes
SHA-256: be9fbafda61d70c969a65eb237cc75c042a7af5c073867433d4f40f04fde7740
font_01_sfnt_off00009000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9000 11572 bytes
SHA-256: 8aa107b23bf50bfaea8e1498e3db448c4d591a7a792bfa2a171388a78a03fc28

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