Malicious PDF — malware analysis report

Static analysis result for SHA-256 183626113cf5732e…

MALICIOUS

PDF

75.9 KB Created: 2020-12-04 16:34:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2ff610efd9b2c2c4ecd0ebf6c2f7eb07 SHA-1: 4cf34ce83989c13cab7645092d78e0c46c6229cb SHA-256: 183626113cf5732edc7c688b02af70d782c24903c6e2c1e86cfee2000b559b65
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are to PDF files with numeric slugs, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate the primary goal is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=plagiarism+test+answers+indiana PDF link annotation
    • https://mipurilor.weebly.com/uploads/1/3/1/0/131071035/darog-fakilepakutunal-minupigepip-zivufibojog.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/9390877b.pdfIn PDF document text
    • https://dudezixibuwido.weebly.com/uploads/1/3/4/5/134529197/livuvudib.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.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/c6577e8c-3658-4f0f-a1b2-af8da8999048/82964136385.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/52854732347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9fa872-8071-481e-af83-e849efcc468d/10054577374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/887bf49b-6d02-4f6e-bcc7-84266ce0a4fe/vilibofateser.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/lijasuniwoporig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf5fe6e-97ef-4ff8-bc16-938fe425eae7/kuvisezugawufadokop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02aa3635-2c41-4efa-b54a-18ec9c13e527/wixizijineja.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/sokewipugenajovivoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b4296d-627a-4164-8cb4-4f4e10cf94d6/18697441051.pdfIn PDF document text
    • https://s3.amazonaws.com/xukidosifixi/aquaman_2018_full_movie_online_free_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b92fcd-dc89-47e1-9325-3aac5712acf4/66132106313.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_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 5240 bytes
SHA-256: e6019c0036ec391c7becfe53b427af360a582cc6d7e2f6c172a7b4dc3244684d
font_01_sfnt_off0000fed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED2 10464 bytes
SHA-256: e19b593923c095d87739c21302589a1c450a1627a44526efa3f1606acd45c312

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