Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1f2e647ca1f5f2…

MALICIOUS

PDF

65.3 KB Created: 2020-12-30 19:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2400d84b85e598c1883c4cff654edd7e SHA-1: 416ada0b1557b4b83f711c3bfdf511dfa1c57d22 SHA-256: 1d1f2e647ca1f5f213edb2dc75c8edbad1e16d2b3847375c7383ce6d4b3d1025
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffmen.ru/123?utm_term=socratic+seminar+questions+for+1984 In PDF document text
    • https://cdn.sqhk.co/girewobo/T0jhgS1/40921019172.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/WijcFjc/saxuximirujumokenoperag.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/7298420.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/fopiw-nijuwunumusimax.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/timoxiliviw-xagal-garezozidifu-momib.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/ji7jjhj/xunuzirubomopokakaguwaj.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/jijumupade/wobate.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/2731513589.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/akg_y50_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/sentence_and_sentence_fragment_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7899699-d3b0-474e-be15-09cf20e27a48/woxotifalajowozumufanen.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_off0000c2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E4 5712 bytes
SHA-256: 54a90d47d5d2838d1cff1bfe654260f31a33638bdd0bc355511fe304fc1890cc
font_01_sfnt_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 10148 bytes
SHA-256: 65a9f388c456f1488ffeff8e5c1de57a1c37ea7578914d4a3d6f2d0c8cb1dfe0

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