Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cd14af39b6e8b9…

MALICIOUS

PDF

80.1 KB Created: 2021-03-22 01:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3f170b4047f741578e56f74cbc2e22a SHA-1: d700e5aedc4a22252a0148dcaa270b23ac9c1f2b SHA-256: 62cd14af39b6e8b973cfc8033fa68045b72a353aae96767ef67a9edbabb3b1a6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a malicious domain, disguised as a lab answer key. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site. No scripts were extracted, but the presence of external URIs suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://xezojetit.ru/wix?keyword=measuring+with+a+microscope+lab+answer+key
    • http://eyebrowthreadingdallastx.com/doubledown_casino_vegas_slots_free_chipshgal7.pdf
    • https://cdn-cms.f-static.net/uploads/4485454/normal_6045faf755390.pdf
    • https://cdn-cms.f-static.net/uploads/4529893/normal_604caa5590b68.pdf
    • http://instasurprise.online/how_to_draw_a_catxfib1.pdf
    • http://pe50off.info/raperotajowezidozomuzagqced.pdf
    • https://cdn-cms.f-static.net/uploads/4376619/normal_60563562d73dc.pdf
    • http://electriccannoz.club/pokemon_fire_red_cheats_gba_emulator_legendary_pokemonwqs9c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jakujakula/kodag.pdf
    • https://s3.amazonaws.com/tevomenil/gukomezunalivu.pdf
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_d652acedf2e541dd800803f3a9d04a74.pdf?index=true
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_201abe549b0f457085af62cbcaf1953b.pdf?index=true
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_73e261e8560040eebab23e1217391c76.pdf?index=true
    • http://mifetominugumow.epizy.com/53057327937.pdf
    • https://s3.amazonaws.com/tumasun/craftsman_25cc_gas_blower_fuel_line_replacement.pdf
    • https://s3.amazonaws.com/nefunupu/warewes.pdf
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_1c69e6f4c62249b98ab00b6a9c0a3591.pdf?index=true
    • https://s3.amazonaws.com/loranoduzuja/gotham_challenges_cheat_sheet.pdf
    • http://nosikugabuvisal.epizy.com/downfall_game_guide.pdf
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_332fa478c5f742159769a3bf59b0e7c0.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_off0000f83e.bin
84806ac154677643d2e4e4ea1c30d4dcf3554357db138a9da2d60441e5b79873
pdf-font-stream PDF embedded font (sfnt) at offset 0xF83E 5748 bytes
font_01_sfnt_off00010bcc.bin
c2bcb0484befa348b0948e6b97fac601072156f86d734444b4b8c48123b6547d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCC 11544 bytes