Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4950df76679375a…

MALICIOUS

PDF

71.2 KB Created: 2021-03-15 20:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 02815f4d58aa0ee899114caf690901fc SHA-1: d60c3908f08729d83ee4da6cfe308b6a72cc87e8 SHA-256: a4950df76679375a6719a7474772346659af83778198484f49bc06413e9fec3a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs, including a link farm on disposable hosting, suggesting an attempt to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=vivat+jesus+translation PDF link annotation
    • http://vir-tus.com/national_treasure_book_of_secrets_movie_castmdne1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_604ca5911e4fe.pdfIn PDF document text
    • https://cdn.sqhk.co/kegimovotol/yfnPjbD/ice_climbers_ultimate_desync_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/iDEjdgd/digidesign_003_rack_drivers.pdfIn PDF document text
    • http://abreudesigns.com/86341966144zyq8u.pdfIn PDF document text
    • http://afracheat8.xyz/the_maze_runner_book_series_reviewffpsn.pdfIn PDF document text
    • https://cdn.sqhk.co/fekerepusa/lhiK3jc/project_v4_gameplay_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415302/normal_5fc7eaf4ad3d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_600aadc30bcdb.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/jgl5ifC/44688515215.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jomepow.rf.gd/93324259494.pdfIn PDF document text
    • http://dasudigakufise.rf.gd/fisutufogi.pdfIn PDF document text
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_04d0f46d76f9453d81467be8963d6e41.pdf?index=trueIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_c86544d1c1214f90974df0e6b47058a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/juvajak.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/10886670431.pdfIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_1712b841578e4b19b4af7a66c57ccc61.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/chrome_app_android_2._3.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/subuzinisepesojapa.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/pikibijifakejo.pdfIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_a1d035593e7d45caa751a15a7c387243.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40B 4780 bytes
SHA-256: f73ea50b833cf16a68a6a190ea2e11ef5e41277fa6911e18e6930372c8d9ea09
font_01_sfnt_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 12824 bytes
SHA-256: 0e1bf4d297c8061cebfd91e0d5a8179d77905c61dc733fcecc595d3a38c0b3d5

Open this report in the interactive analyzer, or submit your own file for analysis.