Malicious PDF — malware analysis report

Static analysis result for SHA-256 97858e5d95db3290…

MALICIOUS

PDF

65.1 KB Created: 2020-12-17 15:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 117a6ba8c10381ded41761b719747cb3 SHA-1: 70091fcbcb7614203bb77c067935ee5381d1b5b5 SHA-256: 97858e5d95db329025c2e8c82ae956ea898f72572935cc635f45c67d49a4332c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of an external URI and the overall detection suggest a phishing attempt disguised as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?utm_term=nutrition+diagnosis+terminology+2020 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc53ef3116eb00e3c68816f/t/5fd1b7179a9e5443ac797457/1607579416466/xobox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5dc0a0a2757459b04ecdf/t/5fcc5d0874a40730fb8fd637/1607228680614/vewixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f14dd6-b6f3-4705-bc5b-4e134c84f2fb/16487127568.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/dosiribudunawaf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7bc2ea4d75e5252f6a625/t/5fc7e81b64cad75cc6cdd01b/1606936604375/konalijijanezotowux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/493d967c-807c-4d09-a873-af4478b95b47/encyclopedia_judaica_vol_18.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10aaaf9866f3fd2d521c0/t/5fc3161fbc819f1cf43e6191/1606620703991/85681716691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b6262b-21c6-4119-bf12-80a376291568/american_ideal_nude.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/79334399030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b226ae-f69e-4a12-a71f-1242cbb91089/5406495058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b735238a-256a-4b8c-82ba-92dd0b7be08d/18805455122.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_off0000c195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC195 5492 bytes
SHA-256: 3a000621ede1fc3b0b952aa2a21de216313542181a26bc3c343a567a34d62f93
font_01_sfnt_off0000d433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD433 10368 bytes
SHA-256: 1374c8c104ddf04d945f15f641f9c28e1ab47c7ef0f01c42b6a0f9172c423f07