Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1b3b1a2eff7fdd…

MALICIOUS

PDF

76.9 KB Created: 2021-03-22 16:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81a60823c53ccc284643cd9c1756d432 SHA-1: d1e0d01a516f74936673605523d79a34150875d5 SHA-256: 9d1b3b1a2eff7fdd6bb19d1b27728fd4398f6660e14317f6933be991aa87cf5e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains a large number of external links, many of which are SEO-optimized to appear as legitimate search results for documents, a common tactic for phishing and malware distribution. The primary malicious URL identified is https://maypoin.ru/award?keyword=banking+regulation+act+1949+pdf+in+marathi, which likely serves as a lure to a malicious site.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=banking+regulation+act+1949+pdf+in+marathi
    • https://cdn.sqhk.co/xokunafuse/4jicjfo/25437020373.pdf
    • https://cdn.sqhk.co/segenapiza/hdc65pP/pemuselikababusakemok.pdf
    • https://cdn.sqhk.co/fepefudasor/3jbmIge/asahi_pentax_sp500_manual.pdf
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/3634574.pdf
    • https://tawusizigegik.weebly.com/uploads/1/3/3/9/133997505/zanevuj_fegitudo_deketuxazom.pdf
    • http://zitugaxusi.mygamesonline.org/resumen_por_capitulos_el_pequeo_vampiro.pdf
    • http://paxezimusosesa.scienceontheweb.net/7th_grade_math_problems_and_answers.pdf
    • https://kotidirexi.weebly.com/uploads/1/3/4/3/134358756/gufamiwirev_sifazagus_bamerud.pdf
    • http://wikotimu.scienceontheweb.net/how_do_i_take_a_screenshot_on_windows_7_with_keyboard.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/lupuvogotog/80278522865.pdf
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_884d1ac198bb496287d93b09218b0a3e.pdf?index=true
    • https://s3.amazonaws.com/xajowu/96755244230.pdf
    • https://s3.amazonaws.com/rutufokedizon/17154231936.pdf
    • https://s3.amazonaws.com/rizijubovapuk/22438538580.pdf
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_3a16f2a568d7435b8c5682fc010fd250.pdf?index=true
    • https://f2f8a3c9-3ea7-4a25-b7e2-3e2749f32899.filesusr.com/ugd/f0e51d_d2d47567085040f4a8ecf4eb523f62c4.pdf?index=true
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_37bbb35baf9540b08a30d9da1affa390.pdf?index=true
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_7e71dc978c1544989d0e7eb9acc94afe.pdf?index=true
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_b1f2e4c2a5594a7589f58bee80fb7bdf.pdf?index=true
    • http://kuxubakelixuzot.atwebpages.com/mefotezarinu.pdf
    • https://s3.amazonaws.com/dafumuxitupav/77264975135.pdf
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_ae0add60e5454283b6ddd29520485b99.pdf?index=true
    • https://cd65756b-a9c7-4cca-9498-1747a6459195.filesusr.com/ugd/05eb20_600f8dbe0d994b60b12c1d1cf14b0047.pdf?index=true
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_a8a207a8ba8640c785d2b9c179941ad6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b9.bin
d6a281582fd913d50d374f9dc42b6187ade0fc5efe47209a3b68fcf918adc496		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B9 5800 bytes
font_01_sfnt_off0000e85f.bin
e2542717126620a09158f2de6a6f447dea4cc5dae3eadf8f527f90876f19afe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE85F 10936 bytes
font_02_sfnt_off00010e2c.bin
15dbec942db135163245954cf891898f120b71aeaed9d465ffc166b5e33066f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2C 6384 bytes

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