Malicious PDF — malware analysis report

Static analysis result for SHA-256 7026551b97dbaaca…

MALICIOUS

PDF

71.2 KB Created: 2021-03-06 18:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ee042319f927ca737dc81bd9340f317 SHA-1: 40a5c0b4572035ed0f279710f66f4fc69a31f641 SHA-256: 7026551b97dbaaca13e45535df07b069631c7e2f41ad52ee482388eeac01029d
156 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a likely attempt to redirect users to malicious sites.

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://kuzutuzo.ru/wix?keyword=paddy%2527s+paws+phone+number
    • https://zipuwuxa.weebly.com/uploads/1/3/4/3/134376087/9048732.pdf
    • http://kemamibuke.mygamesonline.org/who_invented_the_phone_and_why.pdf
    • http://flathead.us/kumon_answer_key_level_i_mathzzfpn.pdf
    • http://sputnews.com/ambari_kannada_video_song_hdu49i9.pdf
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/6666637.pdf
    • http://mitatizizuje.mypressonline.com/rurogigogimemade.pdf
    • https://sitavekoked.weebly.com/uploads/1/3/5/9/135974486/3279106.pdf
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/kokobosotifalapi.pdf
    • https://jasujidavoja.weebly.com/uploads/1/3/4/7/134770870/2662038.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_90e04c1fe23e402ba755e78463628b9f.pdf?index=true
    • https://s3.amazonaws.com/limepusotanal/tablayout_with_fragment_viewpager_android.pdf
    • https://s3.amazonaws.com/kuxuxemu/88454656884.pdf
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_65479b2d56c042cc8c03f1e170c470ee.pdf?index=true
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_77da966625a44b2fad98cabdd48cc9af.pdf?index=true
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_a12d8836db5d46edbe3e16a9521c4031.pdf?index=true
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_1e46614e8c9546ceb0f67a675bdf7f40.pdf?index=true
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_c8175b64fe0a4369bf237310e1e98b58.pdf?index=true
    • https://s3.amazonaws.com/fogibi/xutuviba.pdf
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_8b9754a91e6e4660a7d32e77810dbabb.pdf?index=true
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_a12e59b19c31463c90681549284784c0.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_off0000d9fd.bin
0a8dbbb3793c2d472c8ce1ad60cd1e91c17282a2a560f6908c9059443e29bb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 5536 bytes
font_01_sfnt_off0000ecbf.bin
875117d3bcc1d430032e8828173a62248e806555c6578780f30ffedee3d51397		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 10116 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.