Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03dbab0d3b5b4ce…

MALICIOUS

PDF

75.6 KB Created: 2021-03-17 10:09:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0f39f1438c864497a25175a70a7a9c8e SHA-1: 8135ccfc9a950153c0ac79be524034c1a5f15815 SHA-256: d03dbab0d3b5b4ce81318e7946bf3dffc8cec58223e7f16e823be44467050ecd
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically pointing to 'resalured.ru/award', suggesting a phishing or credential harvesting attempt disguised as a document about project management. The presence of many links on disposable hosting further supports this, as it's a common tactic for distributing malicious 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://resalured.ru/award?keyword=agile+approach+to+project+management+pdf PDF link annotation
    • http://santecmb-sarl.com/how_to_make_3d_models_from_picturesumk05.pdfIn PDF document text
    • http://whalesqpa.fun/toshiba_vhs_and_dvd_player_combozk97w.pdfIn PDF document text
    • http://alcozerox.com/7756060395667u3j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_6043e97c46893.pdfIn PDF document text
    • http://rinavorepem.iblogger.org/edit_bookmarks_mac.pdfIn PDF document text
    • http://xugafigipi.22web.org/bhandara_me_nache_mari_video.pdfIn PDF document text
    • http://instacopyrightcenter.com/descargar_libro_de_baldor_algebra_completo_gratisu2c0i.pdfIn PDF document text
    • http://iranomics.com/gitilepuzolidunosapefovi8fiix.pdfIn PDF document text
    • http://bonus332.site/seneca_on_the_shortness_of_life3yyy2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_60348e3a6c7fa.pdfIn PDF document text
    • http://bitcoins-profits.com/baporujibijadajuvimasadecs3vf.pdfIn PDF document text
    • http://cabinetshq.xyz/what_are_5_major_beliefs_of_christianityx45g4.pdfIn PDF document text
    • http://ulekschool.online/17352308986v4jju.pdfIn PDF document text
    • http://fimewot.xyz/zolalomewupovn6zs0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_4bd0a74407184013b56a363b204c8319.pdf?index=trueIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_05c06466f9e44be4b89077f8ff885932.pdf?index=trueIn PDF document text
    • https://63150c49-9e7f-4923-bc7a-1e4049050ce6.filesusr.com/ugd/cba449_08721e9ff0b04aa9b32534a2d9dcc0d7.pdf?index=trueIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_59e44e20e2904ed792e4fc5b26b4b5c5.pdf?index=trueIn PDF document text
    • http://jusaketij.rf.gd/silicon_valley_episode_guide_season_5.pdfIn PDF document text
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_8ad0a30cf23c4d6abed304495dbcd797.pdf?index=trueIn 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_off0000ea2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2D 5456 bytes
SHA-256: 6e2a0c8d779b3018def59b3aee991d5a0f66eea2c47bf0feb48769ee21464e72
font_01_sfnt_off0000fc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 10632 bytes
SHA-256: fda87ee23bffe2479c11c016b08287760fb2052fa870e5ab666d22f833d1cac7

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