Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45934860c5e2323…

MALICIOUS

PDF

73.3 KB Created: 2021-03-31 00:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5518dabf1a5c089857e044ed26efaef4 SHA-1: 5f43a526891a603a99e5679e572b98464e7f80b4 SHA-256: d45934860c5e23233132fd8c57d18a948c296c008a4f051e2df99b0a8ebc9270
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document contains numerous embedded URLs, with a notable heuristic identifying it as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/123?utm_term=accenture+digital+health+pdf PDF link annotation
    • https://legipulevigo.weebly.com/uploads/1/3/2/6/132695741/70e1b.pdfIn PDF document text
    • http://frut-tree.site/maxulosizes1yds0.pdfIn PDF document text
    • http://digitalmicroteter.xyz/jusinenavajujotuwojis534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443815/normal_6031de18d688e.pdfIn PDF document text
    • https://tusigidufamem.weebly.com/uploads/1/3/5/3/135350313/6225231.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/14720772201klyu5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388598/normal_5ff96be132166.pdfIn PDF document text
    • http://nevepojikita.22web.org/12796580119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_600dde502f7c1.pdfIn PDF document text
    • http://sewonmedix.ru/illuminatus_trilogy_reviewb22ne.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bilexijo.rf.gd/kojuwutixetijo.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_a2bb375535214b82b9b16c490a0069bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e88722c-e335-4f53-8c1a-1130e6ffb8a3/canon_sx700hs_manual.pdfIn PDF document text
    • https://9005981c-20a7-4b93-9dfe-a591c0bc6fcf.filesusr.com/ugd/afbba5_a4721ea82a814edbb4dede257ebc0391.pdf?index=trueIn PDF document text
    • http://binawojojin.epizy.com/bengali_parikhit_bala_baul_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75aba26f-86b1-4647-9d0a-b2f0dd14e376/19316176950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c96e520-34c5-4bc1-bf11-b17edec80f2c/historia_de_las_relaciones_comerciales_entre_mexico_y_estados_unidos.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_off0000dfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE3 5228 bytes
SHA-256: c966adb90098ae7efc6a146473c603b48cd8faf3ca652042fd9056d7b951d33d
font_01_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 11228 bytes
SHA-256: 105e3279bbd04a1ae6455a8ec0d60fff6d7f78be89b9021e0357b6c1017e251f

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