Malicious PDF — malware analysis report

Static analysis result for SHA-256 b183035095598413…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 23:33:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea0fc8f5e6e6f450cc59b8be0c61e91a SHA-1: 9ede67b84d2d33291ac5dcaa2d508ef90d50cf29 SHA-256: b183035095598413b74cf9ce1706ad2dc332415f54e8ec299e0eb74e08979de2
156 Risk Score

Malware Insights

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

This PDF document contains a mass external link farm, with one prominent URL being 'https://leonvi.ru/wix?keyword=hill+climb+racing+hack+apk+android+1'. The document's structure and heuristic firings suggest it is designed to redirect users to potentially malicious or scam-related websites, masquerading as search results. No scripts were extracted, but the PDF's nature points towards a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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
  • 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://leonvi.ru/wix?keyword=hill+climb+racing+hack+apk+android+1
    • https://folixesu.weebly.com/uploads/1/3/1/4/131453530/9779066.pdf
    • https://rilumegunelado.weebly.com/uploads/1/3/4/6/134615428/1436098.pdf
    • https://cdn.sqhk.co/mogizufofuj/iajd4p0/wejixunarowabofu.pdf
    • https://cdn.sqhk.co/buxifuludo/ojfphfv/world_basketball_championship_unblocked_76.pdf
    • https://papenuxid.weebly.com/uploads/1/3/0/8/130874395/nefutuximefega.pdf
    • https://cdn.sqhk.co/konidadelan/eydgihf/55213102181.pdf
    • https://cdn.sqhk.co/xubuzivo/yIbgggd/best_claw_machine_arcade_near_me.pdf
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/sitisususomorup-nefurisuf-galube.pdf
    • https://lomameleni.weebly.com/uploads/1/3/4/5/134597964/97edc992915488.pdf
    • https://gebifulud.weebly.com/uploads/1/3/0/7/130775692/b87294e1c5879.pdf
    • https://cdn.sqhk.co/bofagenined/didhbge/julatozo.pdf
    • https://motabuwupogofe.weebly.com/uploads/1/3/1/6/131607229/6951102.pdf
    • https://cdn.sqhk.co/reriwoduriju/iglqsji/82083402071.pdf
    • https://daxosunusopudom.weebly.com/uploads/1/3/4/5/134510034/5241599.pdf
    • https://cdn.sqhk.co/jefapukawore/Zxkz8gg/tibuxakavewaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9ead72e6-41ce-4ea7-8f19-7e77b5d1406b/does_dunkin_have_sugar_free_caramel.pdf
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_fd9fc14843c5495f862191c994b32868.pdf?index=true
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_a8b2c60020f64c39a02655606c77e6f0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/147f5c1f-f9e0-4706-9c95-0c3b58014c89/bedajamarijulawijozapo.pdf
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_4d27ec1218f24f529107c0223957f1aa.pdf?index=true
    • https://264aa3b4-28a3-4a3b-9cf4-afdf28ba9476.filesusr.com/ugd/28a074_89debf50fdb04122af8936505be4483d.pdf?index=true
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_bb94c8001c9b46d79ed810cc63775e53.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ddd10517-0fb1-49a6-a5ac-213a4d7973d5/12420204907.pdf
    • 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_off0000ebac.bin
945229853b5942b132683aa318b53211f1e14229739b6cdc6ea4e8c27ae4725c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 5528 bytes
font_01_sfnt_off0000fe40.bin
7e7832fb7d9727bf6bf1217d70a04ef5c3e39e6d2bc23cdd881af4f85bce9408		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE40 10432 bytes

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