Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76b9c515400b04f…

MALICIOUS

PDF

69.2 KB Created: 2020-11-23 09:02:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 41c476be11be27823788451c2f6ea65f SHA-1: 43673d2a5576858043ae345cc48594fe972aed39 SHA-256: a76b9c515400b04fc59ec82fd6f1df1c23207c11b350a931b11d80673d136dc9
242 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirection lure. It contains numerous embedded links, with one specifically identified as pointing to known malicious redirector infrastructure. The document also includes elements suggestive of a QR code or download button lure, further supporting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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
  • 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://ggtraff.ru/aws?utm_term=bulk+sms+free++application In PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/8816404.pdfIn PDF document text
    • https://wetuwisiw.weebly.com/uploads/1/3/4/4/134495793/a75c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_5fb848a1dcff8.pdfIn PDF document text
    • https://momibugu.weebly.com/uploads/1/3/4/6/134674353/1675a87cad3.pdfIn PDF document text
    • https://zabaruwizugode.weebly.com/uploads/1/3/4/5/134596412/judojodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4bc37de-8388-4f6b-b406-4d1418ed8c5a/planeaciones_avanza_bloque_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8648d12a-5838-4a60-9890-cf0dbd98fd07/sonic_generations_sonic_06_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008c1863-7376-4b18-afd2-4cc957548b8a/63099848468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe75d3e-865b-47f7-bdd9-043f5c871c1d/72867063324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4839284-e552-4674-b52f-06165d08fb75/rilabiril.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8698b5cf-7292-40e9-ad23-adf31f8c227f/62706237504.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_off0000d2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C5 5272 bytes
SHA-256: 661889eed45122137fd9dd9dd8c2c08be69c6edd3706af1fd0dd3d9cc45834a4
font_01_sfnt_off0000e4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A0 10628 bytes
SHA-256: e7e6ba5427b1640e189b6d9ddcfbf42bc203a0518a95f9fa15724caee5293509

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