Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c5e113cf96dbce…

MALICIOUS

PDF

115.2 KB Created: 2021-06-13 01:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c061117ba5354d99ca7b2914b5276e18 SHA-1: acc1de7dd8eb0ac2cf348bfe801cdc4add5e70a2 SHA-256: b0c5e113cf96dbcebb95c04831684f3b333e62e0f6657c37082546765e1177bb
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to disposable hosting and link farms, strongly suggests a phishing or scam attempt. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://chcial.ru/pbw?utm_term=22+chakras+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448124/normal_60291ab12ac13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479691/normal_5fd637396f44e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5fe53070199fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425230/normal_60b825a5ef2b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_601f69ac58775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_606c9a72bdc1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_600841127e394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457332/normal_6004b314d097d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://bulafiko.pbworks.com/f/dj_booth_online_free.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/w/file/fetch/145212318/55613632144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4821046a-df7c-466b-abfe-aef7836d74b5/12616622701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c132ee23-caec-4024-b73d-5d2a90740807/metoxol.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/f/tafigilumugonola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc769958-d1df-4ee7-b811-534a3a30d5ea/40974391094.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/78907894048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3cc831b-a4b8-4d6a-84fd-64f93dad6587/53553903083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5620d1-c706-4333-ad84-c7305062195a/the_scorch_trials_book_plot_summary.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/86947538332.pdfIn PDF document text
    • http://tijigika.pbworks.com/f/65205536620.pdfIn PDF document text
    • http://garifukedako.pbworks.com/w/file/fetch/144844062/13726430208.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD9 3416 bytes
SHA-256: d131d4c19c2c070f76d3081f7bc951cfb6e93bd3b0a3f5786f4121234d99c54b
font_01_sfnt_off00016809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16809 4640 bytes
SHA-256: 02630a3bf70a4153c9ba98532e132a4db60fcb72a316605c96c532184c7e339a
font_02_sfnt_off000177c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177C3 14672 bytes
SHA-256: eb61f6267f4cc1560b405cf462f82a7dbfbac240561587ab9c3c3e554ccba63e
font_03_sfnt_off0001a558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A558 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
font_04_sfnt_off0001b358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B358 3004 bytes
SHA-256: 8dc37df8f2d462d539638731853525c60d07f46e489bc300b231f231ef6431dd