Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9902babaf4150a…

MALICIOUS

PDF

83.0 KB Created: 2021-03-14 14:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3d621c0e28ffd814450fb66707dffe3 SHA-1: 7a17265e77a268df576f4beec479846a853894d9 SHA-256: 9a9902babaf4150aaba29730298130c08b3410b407f35acc07bfb902c2d5f378
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or trojan distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The embedded URL `https://kuzutuzo.ru/wix?keyword=minecraft+teleport+to+spawner` indicates a lure related to Minecraft, likely to entice users to click through to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/wix?keyword=minecraft+teleport+to+spawner
    • http://1offpark.xyz/dungeon_defenders_3_release_dateftucb.pdf
    • http://loveworld.club/bts_bring_the_soul_movie_free90uh8.pdf
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/vujuserafu.pdf
    • https://kesowetowewi.weebly.com/uploads/1/3/4/5/134598476/pelenurekivakegir.pdf
    • https://cdn.sqhk.co/jeposanop/aemShhW/74173062536.pdf
    • http://nepatokada.mypressonline.com/human_axial_skeleton.pdf
    • http://dorightunion.com/simmers_dho_health_science6pdim.pdf
    • http://ipai.online/the_courage_to_be_disliked_audiobook_downloadng7w4.pdf
    • https://lafumunokude.weebly.com/uploads/1/3/4/6/134666321/zolaxoxetoxepojixiza.pdf
    • https://zavegikow.weebly.com/uploads/1/3/4/8/134884987/9a0448cccb88.pdf
    • https://cdn.sqhk.co/kezavilageg/ibOpie2/67523990149.pdf
    • http://xijipeva.mypressonline.com/67741811709.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6430c5f1-97e1-4bcd-b07a-7ad66cac444c/wefejudotu.pdf
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_6595e5673d3049b4ad5549045c871290.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_6a07d18efef24e2484aff95027ef089f.pdf?index=true
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_c0b166f24e414f88aaa43c2d79398d24.pdf?index=true
    • https://e064a861-6c7b-46af-b67a-66be1f32d776.filesusr.com/ugd/ec3e4b_eebb0b52e6d64eb8bdf1527728b5f24a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5d79b391-51e9-487d-89cd-e52b1b2f55ba/31615555188.pdf
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_876b49280f4e433a918c05201210cacb.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001053b.bin
44bc1137157125d683e49be7cb1f8039b93d89c325b22c8d5d9b9bad9d62cea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1053B 5108 bytes
font_01_sfnt_off000116c6.bin
2ab9f754f99b4d26c16136f8104632ac508e0066c665a2c505aec8385415342c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116C6 11876 bytes

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