Malicious PDF — malware analysis report

Static analysis result for SHA-256 c552711156466561…

MALICIOUS

PDF

68.6 KB Created: 2020-11-18 08:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4b61b15b42dfe415d5ae4b2cdeed62eb SHA-1: c07ab1e9b29ba4383e0906c26e81f71c313c2c5e SHA-256: c55271115646656135b93e3a792ac4be02b8bc11aaad6208e7565aa4ee4fc3b3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV also flagged this file as malicious. Although no scripts were extracted, the presence of a malicious URL strongly suggests the document's intent is to lead the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/123?utm_term=limit+comparison+test+calculator In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5fa3119096d5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f98e8bcb8eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_5f980d4c698e5.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/b34c1221-3788-4dd7-813d-457b4eccbc6d/muzusaguj.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/fijiwujafokirovizozudiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cfe3637-66a7-4fa4-8da8-9a58e82e002c/88464056548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9815b2f-81e5-4eb1-a84a-09babaf2a820/51689029819.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/skolsko_takmicenje_matematika_zadaci_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/45987893482.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/tisopesodom.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gradle_asciidoctor.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_off0000cfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEA 5020 bytes
SHA-256: 91c98ca7c965f0ac1d79244745410c197bfc7dd3f6fee35d07358df299965e9e
font_01_sfnt_off0000e0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E7 11120 bytes
SHA-256: 46c1f4bdb3f345d5a9bf8fea06df635c5e46003fc9aff9a14ca1d77987405adb