Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a52b24ff01550dd…

MALICIOUS

PDF

70.3 KB Created: 2020-11-10 20:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1d1ae95dc2e4a62158cfbbf87774c9cc SHA-1: 90bacc5555ba66ffbc584ecabe99263d2d480a16 SHA-256: 9a52b24ff01550ddfb726f743384104d7036fc7a2ced67bc8cea3fd41538efbe
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?keyword=sms+is+no+longer+supported In PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/megemila_kigalolorete_gufafif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_5f9f81214b901.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/658aaf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457592/normal_5fa6a4cf94db4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f98c6e048026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f89e70538bc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_5fa866d9d4bce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_5f999e0a35424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f89496eb8e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_5f8fac79d0c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_5fa90fb484993.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://s3.amazonaws.com/luramamelolem/dihybrid_cross_practice_problems_answers.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC865 5056 bytes
SHA-256: e30a46efc5b4ed6dfca8d4d47903f275b928a48752a933019fa33d60dc17c3ad
font_01_sfnt_off0000d970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD970 10912 bytes
SHA-256: e8e3ba40b99ef64b23f8092ecc683e6864d5b01f239f3f62c9fc07698a02ba3f
font_02_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.