Malicious PDF — malware analysis report

Static analysis result for SHA-256 5150064249615e26…

MALICIOUS

PDF

75.2 KB Created: 2021-06-01 07:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c4ae6b637500c4fe3c6d9ce3c818e39b SHA-1: b8c0763d44738c84d861d5a5e3fee8d8290a5b29 SHA-256: 5150064249615e26480f4e0da0730ac1587ce97dac37de157645313c9e1de855
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a link farm and a phishing/trojan threat. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to SEO poisoning or a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://irlanc.ru/pbw?utm_term=how+to+breed+vapwhirl+in+monster+legends+2020 PDF link annotation
    • https://bazuditok.weebly.com/uploads/1/3/4/5/134590154/a2db791.pdfIn PDF document text
    • https://xaxusirawo.weebly.com/uploads/1/3/4/3/134318026/6badfe6665.pdfIn PDF document text
    • https://wupebeziwemipi.weebly.com/uploads/1/3/5/3/135315897/3778823.pdfIn PDF document text
    • https://luwigemo.weebly.com/uploads/1/3/4/5/134597726/6426288.pdfIn PDF document text
    • https://sexaximelukifa.weebly.com/uploads/1/3/1/0/131069869/mubuzelopuwux-rezep-mosozeka.pdfIn PDF document text
    • https://bimevaxufozuz.weebly.com/uploads/1/3/2/6/132683359/rikasenom.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/demujuloled_dudizax_jelupawodenepa.pdfIn PDF document text
    • https://nigokozop.weebly.com/uploads/1/3/4/4/134436215/raweg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiletejude.pbworks.com/f/59397751878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6c5183-5027-4287-9888-f9e61bb49e73/24282359113.pdfIn PDF document text
    • http://zigunef.pbworks.com/f/93506171540.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/60854263717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec7aa03-946f-45b3-866a-4d9c2f5e916d/how_many_kcal_to_gain_1_kg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6472e17d-54ad-42e6-8a38-ce9daa17b211/holmes_tower_aer1_hepa_air_purifier_filter.pdfIn PDF document text
    • http://xovelezid.pbworks.com/w/file/fetch/144416310/88470919142.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144416064/how_to_spawn_a_helicopter_in_gta_5_online.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/f/how_to_make_voucher_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51618750-474c-4a8f-a8b7-b98a67988925/mufos.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144423993/riganugate.pdfIn PDF document text
    • http://jumedew.pbworks.com/f/88779508850.pdfIn PDF document text
    • http://barumena.pbworks.com/f/what_does_mild_pulmonary_congestion_mean.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_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 5900 bytes
SHA-256: 042d48169896d22c9c41465839fe76e2bfb1695383e35db7d92c34365be07a9d
font_01_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 10880 bytes
SHA-256: b85c1fc813bd106d9e1ef7ec87e51289a4a76aa9c57be9d195e9f389a96cf273

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