Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cce1ec8eea75287…

MALICIOUS

PDF

88.6 KB Created: 2021-03-18 00:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16edbf703eb21062db5bedef75fc94f8 SHA-1: e5c28a4ae93d3f857956962090f517089ce66432 SHA-256: 3cce1ec8eea75287e546c18abc1098332762421409e7561e8b8b1bebc35d3682
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The primary URL, 'https://resalured.ru/wix?keyword=coin+master+free+spins+link+2020+haktuts', suggests a lure for game-related freebies, likely to trick users into visiting a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=coin+master+free+spins+link+2020+haktuts
    • https://cdn-cms.f-static.net/uploads/4450138/normal_6018c584932df.pdf
    • https://static.s123-cdn-static.com/uploads/4475734/normal_5ff067b5f2e5a.pdf
    • https://static.s123-cdn-static.com/uploads/4417426/normal_6007a00db3502.pdf
    • https://cdn.sqhk.co/sigidezok/f7Ajiid/43426118637.pdf
    • https://cdn.sqhk.co/sedazozesufu/iiemGhf/facepunch._io_boxing_arena_unblocked.pdf
    • https://cdn-cms.f-static.net/uploads/4370055/normal_60111f3f2cdd0.pdf
    • https://cdn-cms.f-static.net/uploads/4423772/normal_5fd8b5946f051.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_e7743c2338f54c758874073d1bbe2333.pdf?index=true
    • https://s3.amazonaws.com/vezumobigodub/boxumukima.pdf
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_d6d0aafe76774f00acb8e657c821f58b.pdf?index=true
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_6e9eda5bd8e84e05b3282e3436ab09d5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1c8bd8bb-db80-4bb8-aadc-b194932261bf/nexikasarif.pdf
    • https://uploads.strikinglycdn.com/files/0f5098ce-c0ec-46a2-af5a-44110d9246fb/2012_highlander_liftgate_problems.pdf
    • https://uploads.strikinglycdn.com/files/7b961565-5dd1-49a7-b909-4618ae9d9474/gezigatugukokilufevabux.pdf
    • https://s3.amazonaws.com/mejobu/maplestory_mesos_making_guide.pdf
    • https://s3.amazonaws.com/liluvad/56064147730.pdf
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_5c3aaf890c2b49d496ec78bf5710ef6b.pdf?index=true
    • https://s3.amazonaws.com/mipizaju/duzugemisabinumomikirofur.pdf
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_91c8d311e5a94d6abac311554abfa7d5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9dbf3295-60af-42bd-9aef-a394d2b3b92a/doduvi.pdf
    • https://s3.amazonaws.com/bulozor/29107318384.pdf
    • https://s3.amazonaws.com/neporezofov/bomelomokatanu.pdf
    • https://s3.amazonaws.com/pipaneku/33692416901.pdf
    • https://s3.amazonaws.com/zamemigojat/homelite_trimmer_carburetor_adjustment_tool.pdf
    • https://s3.amazonaws.com/metakibeme/80463741951.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9b7.bin
4f8eff51b0823f1516901e7d189c37b741e835c73b94dbe0f2010767c04f11c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 5384 bytes
font_01_sfnt_off00010bca.bin
402b6257f938e3fb73d4b8aed8ef6cba2d9cbacec78824eef89e09e94768c35d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCA 2284 bytes
font_02_sfnt_off00011611.bin
faab910a2882132f59f5c264cd5543ce0244a5b1e20cfea2afc101bc1b3932cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11611 12160 bytes
font_03_sfnt_off00013eab.bin
3a0f8ed008c79ef5fc1e40fbe805bb4ed86c3b537cef76351acb51b29d81aea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAB 16080 bytes

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