Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eaefad90ad792e1…

MALICIOUS

PDF

86.6 KB Created: 2021-03-16 15:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a65835cafc8fa5d80c31a7556e876707 SHA-1: 18f5d680e93f45bd86018c4318d585ce4cb4b1df SHA-256: 5eaefad90ad792e1916943ff2dc0fe53166be94bc04eecd043a0d3fbecf9d5c2
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to direct users to potentially harmful websites. The ClamAV detection and ML classifier strongly indicate maliciousness, with the primary URL being a potential phishing or malware distribution point. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/wix?keyword=yesterday+2019+google+docs
    • https://cdn-cms.f-static.net/uploads/4466664/normal_603b1b4b23264.pdf
    • https://cdn-cms.f-static.net/uploads/4485801/normal_603df0cf5aea6.pdf
    • https://betisifi.weebly.com/uploads/1/3/1/4/131438474/f26573d0ae77334.pdf
    • https://cdn.sqhk.co/fazituku/ehcgNPf/carpet_cleaner_near_me_yelp.pdf
    • https://vevurufutugar.weebly.com/uploads/1/3/4/7/134737477/2f797a4.pdf
    • https://cdn-cms.f-static.net/uploads/4370528/normal_601ebda7c10d5.pdf
    • https://cdn-cms.f-static.net/uploads/4388174/normal_5fe990ad423fe.pdf
    • https://cdn.sqhk.co/bomoxale/gjiaNV7/lego_batman_2_dc_super_heroes_money_cheats.pdf
    • https://static.s123-cdn-static.com/uploads/4446774/normal_5ff1e00f038ad.pdf
    • https://wubajepetodol.weebly.com/uploads/1/3/1/6/131606368/sikewexifazex.pdf
    • https://zibesotisudub.weebly.com/uploads/1/3/5/9/135996238/2554162.pdf
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5fc9560027c3b.pdf
    • https://cdn-cms.f-static.net/uploads/4490534/normal_601f7f127ab78.pdf
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/8fe43e780d.pdf
    • https://static.s123-cdn-static.com/uploads/4387241/normal_5ffa5bc343406.pdf
    • https://static.s123-cdn-static.com/uploads/4498994/normal_6001cfdbb720a.pdf
    • https://cdn-cms.f-static.net/uploads/4485012/normal_602205e234415.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lefemijip/noxogon.pdf
    • https://s3.amazonaws.com/mukut/17373341351.pdf
    • https://s3.amazonaws.com/satulibaren/new_pokemon_game_2019.pdf
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_d35a68c0c6054c79b5817516e2673424.pdf?index=true
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_4c9fa47d7eda450fae9d91aec0d9a6ad.pdf?index=true
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_81a463708aa14d3a99f6d7319ac36967.pdf?index=true
    • https://170d08c7-2527-4f8e-8bc4-cf7f6ffab704.filesusr.com/ugd/afe24e_8bd2f8af9cd14c47844b49d3dd283b8f.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
    • 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_off0000fea2.bin
6ca09e46de30399dd1c950b7fffb99cc4399c3962f3018c4b18b75f994197430		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA2 5652 bytes
font_01_sfnt_off000111f6.bin
3950680c94e5706df1703002e26cfff80c705580fa0d63282dacabaa9f0bba82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F6 10612 bytes
font_02_sfnt_off00013696.bin
2cadb2ae25cea88cb182acc54f62d1c218aef5f2772c4081b94d5d3cddde1204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13696 16388 bytes

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