Malicious PDF — malware analysis report

Static analysis result for SHA-256 6003530040adee10…

MALICIOUS

PDF

77.3 KB Created: 2021-03-21 01:14:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eacf6f8dbcf76eaa3a524edd407fd40 SHA-1: b356520721a564dbba25fcd990b93339dea504f3 SHA-256: 6003530040adee109acf675114a50aa52223de901f22c325849eb1c74ec73575
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggests an attempt to manipulate search engine results or direct users to potentially harmful websites. The document body is heavily obfuscated, but the embedded URLs point to suspicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=fnaf+ucn+apk+obb
    • https://cdn.sqhk.co/kofatuziwu/c88heha/level_201_escape_room_mystery_word.pdf
    • https://cdn.sqhk.co/wexovezojab/ihfzfji/sudoku_6x6_hard_with_answers.pdf
    • https://cdn.sqhk.co/jekunesoru/YMihiek/chain_reaction_sneakers_black.pdf
    • https://cdn-cms.f-static.net/uploads/4404113/normal_6030cac73bec1.pdf
    • https://cdn-cms.f-static.net/uploads/4426955/normal_60345835d0665.pdf
    • https://cdn.sqhk.co/netesatova/xhfjehd/house_painters_near_me.pdf
    • https://cdn.sqhk.co/ratufewebu/jkgidgf/primal_legends_download_pc.pdf
    • https://cdn.sqhk.co/vekuperik/djhXijy/90633725669.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_e13bb2e307f5439c8af16b78ca7a36b5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3b9df934-adb5-4fe6-870b-fc23d8878756/pejovadixonexozaja.pdf
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_1dca861e9ffd427dba2381b3e11c4189.pdf?index=true
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_dd12a8cca39444cfbbdc425e6c9fa7fa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3511041c-23c9-4e22-b679-13fa917fefbe/how_does_quantum_theory_explain_the_working.pdf
    • https://s3.amazonaws.com/jebokizez/66651467842.pdf
    • https://s3.amazonaws.com/towutoginadivu/math_tests_for_5th_graders.pdf
    • https://uploads.strikinglycdn.com/files/c1fba233-a3f6-42cb-b3d9-f2c8509d9af6/sole_f85_treadmill_disassembly_for_moving.pdf
    • https://s3.amazonaws.com/megujobemegor/gamesir_t1d_controller_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63a.bin
c3b6c7f0d269e84143132b8f8592aaf38a8631da6c0807f21071a936f1047930		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 4500 bytes
font_01_sfnt_off0000f588.bin
a4928c1adc32cc50e8358052827a7d325df281d75e9f639da9be6f001cbf84f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 10632 bytes
font_02_sfnt_off000119f0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119F0 4324 bytes

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