Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b05629e7bebc169…

MALICIOUS

PDF

68.7 KB Created: 2021-01-06 05:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 23ebf3ede4eec9cfc57f1b24fa96d0db SHA-1: d23642aa9be5682cab9bd0ea0267cd66fff4d96d SHA-256: 7b05629e7bebc169996af3fcd39564b79dc9680e09feaa2f8e57d48c6f67afda
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to downloading drivers for an Acer Aspire laptop, which is a common social engineering tactic. The embedded URL points to a suspicious domain, likely serving as a download or redirection point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffe.ru/aws?utm_term=acer+aspire+4750+bluetooth+driver+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5fa78cde3b9c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_5fb45592c06aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390069/normal_5fdce43ad3f94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5ff0493e98f2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_5f9308954051e.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/dOjchfR/92036466783.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/80929872-92db-4b5d-a4fe-7295e93db0d2/75411393215.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/pefosawasozorudubabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f44fada-cb72-4611-9b56-217fb4686783/nothing_in_this_book_is_true.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c18680a-bf4c-4605-b452-664db5760096/tavupididu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2f4cd1-97b8-4810-a848-06392f135981/98049617328.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/kesodowojivigedolinefafez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16d83e3-bcd9-4184-b1f6-82f3a2909a2e/wefaf.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_off0000cf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF62 5864 bytes
SHA-256: 3bca51993c85ee5b1d545f94af4ed7a04dc07d0f7c5295b67d5d3b79978e1d34
font_01_sfnt_off0000e369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE369 10312 bytes
SHA-256: cc45c2601637ab41b50ca8513f0b90caf199697553aa504395fca2755b0e6e37