Malicious PDF — malware analysis report

Static analysis result for SHA-256 532d0f084744f69e…

MALICIOUS

PDF

75.0 KB Created: 2021-03-29 00:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a31b17bfb6cbdf53eec1a0d6ff3ac5ad SHA-1: 0e2e54a740c7de83cb8bb96fffd7b09fee91e934 SHA-256: 532d0f084744f69ed5caf51355eb631cc5ea3cb4cbf6b9d3fef3c7e593513e92
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting services, and a heuristic identified it as a link farm. The presence of external URIs suggests an attempt to redirect the user to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/aws?utm_term=is+the+uglies+series+appropriate PDF link annotation
    • https://dodarumobite.weebly.com/uploads/1/3/1/4/131437296/9556443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479254/normal_5fcc1a38796dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419433/normal_60255b300272d.pdfIn PDF document text
    • https://xetutimi.weebly.com/uploads/1/3/0/9/130968997/2358248.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/12207361209.pdfIn PDF document text
    • http://gopudumimipabol.mypressonline.com/28503494215.pdfIn PDF document text
    • http://xapowuxif.mywebcommunity.org/plural_of_irregular_nouns.pdfIn PDF document text
    • https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/jabutimaxoru-kanoz.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/82754804409.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/oral_lichen_planus_pathogenesis.pdfIn PDF document text
    • http://sosogemizibu.mypressonline.com/nolodefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_603d171aaca0a.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/pikutawovejugawim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_6046110e0e15c.pdfIn PDF document text
    • http://xibiselid.medianewsonline.com/tikojomaxafuzo.pdfIn PDF document text
    • http://dejivuxa.mygamesonline.org/58674851515.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413473/normal_5fec8c04b0d12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_6054792845ea2.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/25ce8335-c907-420f-9dbe-be9c3138018d/53610785915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4060f5ad-6bd7-49ac-ad0d-9a5e34f6dcfe/libro_de_calculo_diferencial_e_integral_conamat_resuelto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd708c5-8817-4f23-8d93-c7e98378960c/introducing_python_bill_lubanovic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23243ee-06e6-49d8-a52f-9c29cbd7c706/jorge_luis_borges_historia_universal_de_la_infamia.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_off0000e75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75B 5016 bytes
SHA-256: 7bddb4c4319972dfb80a53547f17f85cd4b2fe45f1bf9b9f632425400f4fbdfd
font_01_sfnt_off0000f865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 11132 bytes
SHA-256: 0dbeb6e6e23f234fbae02338b3236ff3378c92fe56af28db0637686f6885d62b

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