Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a4879c5d41bcab…

MALICIOUS

PDF

83.3 KB Created: 2021-03-22 05:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c4bbd3ab898b2694cd195c9f9314992 SHA-1: 973e5735591d814424665930b1b50ac8fb181e41 SHA-256: 95a4879c5d41bcab6552c741fc27c96f831b18486f77839eba1bdd6f27c94820
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, many pointing to PDF files on Weebly and other hosting services, suggests a link farm or distribution mechanism for further malicious content. The document body, though heavily obfuscated, contains keywords related to 'subway surfers hack mod apk 2015', likely a lure to attract users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/wix?keyword=subway+surfers+hack+mod+apk+2015
    • https://bevazamosip.weebly.com/uploads/1/3/5/3/135345421/3895209.pdf
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/paliwezifuwi_nanamufotumi.pdf
    • https://watuxiso.weebly.com/uploads/1/3/2/7/132740831/wavolidosa.pdf
    • https://cdn.sqhk.co/lojadisexudo/qx9hkjd/zujova.pdf
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/xexexerozeme.pdf
    • https://lulaxifijugom.weebly.com/uploads/1/3/0/7/130776747/vabamepebof.pdf
    • https://patufefuwo.weebly.com/uploads/1/3/4/3/134312622/7491489.pdf
    • https://cdn.sqhk.co/wibezudak/WicQijl/57815873536.pdf
    • https://cdn.sqhk.co/nuzitomizaj/iFkTMgc/descargar_american_block_sniper_survival_hackeado.pdf
    • https://static.s123-cdn-static.com/uploads/4480403/normal_6001372ca86fa.pdf
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/lamukuwetedikoz-wofuvegilum.pdf
    • https://static.s123-cdn-static.com/uploads/4449603/normal_60009eae69c0d.pdf
    • https://jerepubiz.weebly.com/uploads/1/3/1/6/131606505/bumusaxi_bunosiruvovuriz_gezudunol_mexune.pdf
    • https://tupetemen.weebly.com/uploads/1/3/0/7/130738754/resazimibos.pdf
    • https://fekipasipoxow.weebly.com/uploads/1/3/1/6/131637207/9856954.pdf
    • https://cdn-cms.f-static.net/uploads/4482858/normal_604e9692502f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5364b9e8-55c6-4641-b41a-518f8bb1d0f6/can_you_rotisserie_a_chicken_in_an_air_fryer.pdf
    • https://uploads.strikinglycdn.com/files/9a9088ce-8497-48dc-b4da-bfa1028c8366/44696075404.pdf
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_d9669a6869e2456eb4898a8b6cea2c94.pdf?index=true
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_aa70d0ce9c9e4fefa6f00030b7c30556.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6527ad8b-c6c5-4ae8-8bf7-b132c060ee51/lamborghini_gallardo_superleggera_spyder_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/33081803-c91c-4fb5-a09c-62cd21c7fe57/android_app_development_free_online.pdf
    • https://uploads.strikinglycdn.com/files/0a27d343-6401-4fac-87a4-50499a56cf4e/gadatuvokopibese.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed14.bin
1c2f43fa7d99f9771028d16e9d1981aaf2358922d3997fc570df2c0d293a1250		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 6312 bytes
font_01_sfnt_off00010287.bin
0ee5510c2c2acf09f84d2b293e0fda27de991960fb3f632ae6b719c42c8aa651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 12688 bytes
font_02_sfnt_off00012a9b.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9B 16092 bytes

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