Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd84efdc26e59af3…

MALICIOUS

PDF

71.1 KB Created: 2021-04-06 10:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 05f74e0e47ca7c546c6a91255513309e SHA-1: 7afbe419b9776e7815bf8e25078c0c07094b6a00 SHA-256: dd84efdc26e59af356b301aceb3568b35c5d62b724aa3d2971e768b121d241ed
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The presence of external URIs and the overall structure suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=is+love+sweat+fitness+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412896/normal_601a631447b4d.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/how_many_calories_are_in_a_flavor_shot_at_dunkin_donuts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417817/normal_5fe795304c447.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/ahjPEgd/85903718765.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/41582216263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468563/normal_601ae1d061dcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_603d93fb76a44.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/c2hcA58/gardenscapes_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/renosopezare/hBejfji/pathfinder_adamantine_breastplate.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/gcY00hj/smart_tube_tv.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/17362951828.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/kelusifo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_febeaa97eaa94ab1a9a9a9bc3caff806.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b23839a4-f0d1-4209-91e7-28dda2128f9e/frm_part_2_practice_exam_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbe0ffd4-86ae-4a9e-b8be-da5b9b3e7928/sat_sample_tests.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229fdedd-b16c-42c5-8336-2d696230b2d4/how_to_write_a_null_hypothesis_ap_bio.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/96327368328.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/69923529450.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/11115166978.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_28c72896d92b4637bee17528b20acbbf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/blogs_de_libros_gratis.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_off0000d9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D0 4848 bytes
SHA-256: 3857ad72ce74e36d05d42637a0c906762dc43e17d95695b18876a50d6559322f
font_01_sfnt_off0000ea72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA72 10816 bytes
SHA-256: 3afa8fabe8e0a56ef3ac91c196b286f535a2f3580fdff6a510c05c962345976e

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