Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9bdf80b4d3d580a…

MALICIOUS

PDF

81.9 KB Created: 2021-04-21 08:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c77310d817280a9e664f007bf1fd5ce5 SHA-1: 20f03ccb6742ae2b88958edb38d21e5554628a3d SHA-256: c9bdf80b4d3d580a8dfa1e8d97f62a410bb6cf8f0419a74361cd272c35cbb7ae
156 Risk Score

Malware Insights

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

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains a large number of external links, suggesting it functions as a link farm or a distribution point for other malicious content. The embedded URLs point to various domains, including weebly.com and a custom domain, likely serving as part of a campaign to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://mezovuduw.ru/strik?utm_term=examples+of+broad+statements PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417662/normal_604420ef7f268.pdfIn PDF document text
    • https://wibipujesotut.weebly.com/uploads/1/3/1/3/131398272/zupepojijomaguw.pdfIn PDF document text
    • https://xazonidunigi.weebly.com/uploads/1/3/4/5/134590253/8fdaa5c7d801ccf.pdfIn PDF document text
    • https://daseguvemorog.weebly.com/uploads/1/3/4/3/134357845/7306321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_5fe6f58a8b280.pdfIn PDF document text
    • https://redutoxaxijarow.weebly.com/uploads/1/3/4/7/134760413/libegewala_vafutigamuvev.pdfIn PDF document text
    • https://gugebizibepowe.weebly.com/uploads/1/3/4/3/134364706/75699023cb321f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402707/normal_6004769d3fcb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447903/normal_601063681c8eb.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
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_677a904ca55a4c7f9432a28caa6275ea.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_ce860c4870e04ec9b8a12d5575b20747.pdf?index=trueIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_c1d0e372458b4ae591dbebe9a7bab73f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/how_to_fix_gas_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2e7386-ae2f-46d2-939e-2241c866f757/90526402952.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/bejawada_full_movie_telugu.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_fbb321c89e1e41d4966a465922e412bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/963348509.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/ridukoxavelamafo.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/94788136866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a61994-9918-4fd7-9884-f4c482edccb1/fuji_finepix_xp80_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/woolworths_pet_insurance_claim_form_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/ductility_test_of_bitumen_report.pdfIn PDF document text
    • https://fdd5f4e0-4443-4821-9021-ce7d41436e3c.filesusr.com/ugd/78c764_ad892e55007c41c0a205691d84770d71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voropa/how_much_does_a_family_photoshoot_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d2466f-d8ac-49ec-9bd6-6830bea9ad62/kotter_j.p._2012_leading_change._harvard_business_school_press.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 5092 bytes
SHA-256: 5297ba759b1455ed8d1bb98b19547249ac617319683e3dc8588773f9e2d4fac6
font_01_sfnt_off00010834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 10460 bytes
SHA-256: ffd25b1fb104590dcae282b0d9720267db6d51ed7a2ce053c69385ee8f18acdb
font_02_sfnt_off00012bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333