Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e54abf18f006e0…

MALICIOUS

PDF

68.1 KB Created: 2020-11-20 02:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f9c9805c594adb828de02f9820069e15 SHA-1: daf0b69f62953a8531fe561a3469b4c8a4b778ef SHA-256: 08e54abf18f006e059a1a3dcde5064d1ec9a63a4c40ef2a98a7c6027f74d538f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as popular manga content, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafftec.ru/strik?utm_term=one+piece+893+manga PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469847/normal_5fa4d9abcc0ef.pdfIn PDF document text
    • https://kesemuvu.weebly.com/uploads/1/3/4/8/134881895/5490511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_5f9ea6799be22.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/tosafuwovama.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/zagegenepavofum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_5f9fa85c570f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419001/normal_5fa381f365688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_5fa50cd5a8741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_5fa055bd71ef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487647/normal_5fabf790002ab.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/28757399-7c65-40a5-b604-85c25604ad49/zosunab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7237041e-d315-41eb-bfe4-a85b367627b5/cellular_respiration_worksheet_answers_chapter_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11822db2-4eaa-4167-9940-4ab312bd6462/darolapivafikiso.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB18 2940 bytes
SHA-256: b255dc2f10caa7cf961bab1172e8a2d2e5e83e097d684c71f73ac3a8f13737b6
font_01_sfnt_off0000b596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB596 5488 bytes
SHA-256: 9319c33be1006b3623ce7720a77cdb2c1c488f4b7974b49d95d7d09113afd3a7
font_02_sfnt_off0000c82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82F 10272 bytes
SHA-256: 1116c0b66f662a9ae3b9c8960de5e440e968a76d62d2a61750f2859148d154ae
font_03_sfnt_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 16492 bytes
SHA-256: e74496dc6e25010b780eda681d4d3902b2ae1c5fa097d83a5287a27f6cc89878

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