Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c1dde2e2ddc020…

MALICIOUS

PDF

81.4 KB Created: 2020-12-08 14:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: addd56e26446ade071009a12830382de SHA-1: 1b1b4b367538cab75699d7c517c9184e9286214e SHA-256: 74c1dde2e2ddc020196629d63c45bdddddd4a3230d7b3ab13ddbbd3c55d15360
234 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam campaigns. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/123?utm_term=moderator+vs+mediator+in+research In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_5f9042d52f53c.pdfIn PDF document text
    • https://vefozifus.weebly.com/uploads/1/3/4/3/134382693/didedim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_5fc12574800e5.pdfIn PDF document text
    • https://fidexodopisulo.weebly.com/uploads/1/3/4/8/134861067/rizepaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcefefdae50a014585fd45/1606217712105/15304207365.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5451ac30a162e0c6f580a/t/5fc6f09f48d5672cfb313864/1606873247661/sotolozuzit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1065e159-e9a0-4ff6-9962-c2783d65f818/flregkey.reg_20_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434ed063-112c-4b0e-9cbd-dcb7997c5f86/92844474225.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf0942c6de34c7a37ae84/1606217878777/lego_batman_cheats_ps3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4deb088c99b6d37c0af76/t/5fc6ce046beae454315276e3/1606864389218/lubadezofetil.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/nsk_roller_bearing_catalogue.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a18fea4a794d564a4325/t/5fc82d36bbb7f45a92808936/1606954295830/81155530616.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/cephalosporium_acremonium.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a55211f6a41984adb0b4/t/5fcd712424c49707d33429fd/1607299385193/qr_code_scanner_app_download_free.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_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 5212 bytes
SHA-256: 07fb672e87cb00b200916ada51635b1f4f50d85d76071a1ec7d38fbfc618ea4c
font_01_sfnt_off000110a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A0 11900 bytes
SHA-256: 1b1568538f6bc9440e4d325e60e7d4371cb09a2e67c2c20476442c4ecf3cf89a

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