Malicious PDF — malware analysis report

Static analysis result for SHA-256 592f15de66fb4435…

MALICIOUS

PDF

166.1 KB Created: 2021-03-28 16:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cde8152f6a6ec8efc228eb6eef1e8c9d SHA-1: 691e868bcf9f3a595b6746a5a83edc6b2c179023 SHA-256: 592f15de66fb4435f68a283c68b7c46032acbc14f3c24e5c7a752381d4dea82f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a domain associated with link farming and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://maypoin.ru/award?keyword=magia+della+cabala+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419441/normal_5fe52788ba546.pdfIn PDF document text
    • http://cleanup-sale.site/how_to_write_a_topic_sentence_grade_4kkv37.pdfIn PDF document text
    • http://organicnu.info/tom_clancys_the_division_2_pc_revieww7hcy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389090/normal_5ff42ea715427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_6052ec431bd7f.pdfIn PDF document text
    • http://prod-fruit.space/703150272779a62t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_603d25dd550dd.pdfIn PDF document text
    • http://tixshopclub.space/miludabexetebisimijibbmpmy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_60415cd288abe.pdfIn PDF document text
    • http://xevedudox.sportsontheweb.net/pegoxelufeladi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477400/normal_6041867170269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_602eedde3de31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457008/normal_600252d213e20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5fd72a323787a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470016/normal_5feb9b701f6e8.pdfIn PDF document text
    • http://bivoliku.mywebcommunity.org/amoeba_sisters_enzymes.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/resistance_tube_workout_routine_printable1c92s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459788/normal_5fe94fccb6fd1.pdfIn PDF document text
    • http://lapegokexixij.medianewsonline.com/nolab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_5fd81d10c67d3.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/fisiopatologia_de_la_cetoacidosis_diabetica_en_pediatria.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lakadutof/fanaseguxiwetik.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/47013488442.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/ibps_lic_ado_admit_card.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_off000250d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250D0 5196 bytes
SHA-256: a140656c9ab00e1779a18c6f2f63e5eebbf9eafe12faa12ea3a8aac27f1d19bf
font_01_sfnt_off000262a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x262A0 12376 bytes
SHA-256: 43ba37f314bafc906de9f6cd210d10542c0602bad5f54775756d3ed3402e61d1

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